CN1229373A - Permanent-magnetic hydrodynamic methods and apparatus for stabilizing continuous casting belt - Google Patents

Abstract

Permanent-magnetic hydrodynamic methods and apparatus stabilize a moving, flexible, thin-gauge, heat-conducting, magnetically soft ferromagnetic casting belt (50) against thermal distortion while moving along a mold cavity (C) being heated at its front surface by heat coming from molten metal being cast while being cooled at its reversed surfaces by flowing pumped liquid coolant. Hydro-magnetic devices (38) are arranged in an array (51) wherein flows of pumped coolant (93) pass through fixedly throttling passageways (90) feeding pressure pockets facing the belt's reverse surface. These pockets are shown rimmed by magnetic pole faces (34). Coolant issues from the pressure pockets as fast-moving films to cool the belt's reverse surface and levitate the belt spaced from the pole faces while the belt is stabilized in even condition by powerful reach-out magnetic attraction forces.

Description

The permanent-magnetic hydrodynamic methods and the equipment that are used for stabilizing continuous casting belt

The present invention relates to continuous casting field with the motlten metal of poured with molten metal in the belt caster, described conticaster adopts the heat conduction Cast Strip of one or more annulars, flexibility, motion, for example, the metal Cast Strip, limit mobile crystallizer (mold) cavity or crystallizer space, move along this crystallizer cavity in described one or more Cast Strips, simultaneously, the zone one by one of each Cast Strip enters this crystallizer cavity, moves and then leave the crystallizer cavity that this moves along this crystallizer cavity.This continuous cast products is generally continuous slab, sheet material, sheet material or band or be roughly the continuous bar of rectangle.

More particularly, the present invention relates to a kind of permanent-magnetic hydrodynamic methods and equipment, be used for stable motion, flexible, thin, heat conduction soft magnet magnet Cast Strip resistance thermal deformation, move along the crystallizer cavity in this Cast Strip, its front surface is by the heat heating from motlten metal, the working fluid coolant cools that its reverse side then is pumped to.

A flexible thin heat conduction Cast Strip of adopting at least one motion, when for example carrying out the continuous casting of motlten metal in the casting machine of metal Cast Strip, very importantly, although exist thermometal, and because thermometal enters the high temperature that the anterior face of Cast Strip causes, the thermal stress of the Cast Strip that its reverse side of while is caused by suitable coolant cools, this motion Cast Strip still can keep along a predetermined desired path advancing, and it is even and straight requiring Cast Strip itself simultaneously.To the continuous casting of motlten metal, the thermic warpage, distortion, bending or the wrinkle that usually are subjected to the Cast Strip are grabbed the influence of (being called " distortion ") in the casting machine that adopts at least one this Cast Strip.People such as Hazelett are at U.S.Patent 3,937, and 271; 4,002,197; 4,062,235; With 4,082, among Fig. 8 of 101 each patent and people such as Allyn at U.S.Patent 4,749, thermic transverse warping and bending in this Cast Strip have been described among Fig. 5 of 027.Thermic warpage and fold also took place in the Cast Strip like this.The generation of these Cast Strips distortion can be very unexpected, the cracker that is sent when air enters in the container suddenly when the cover cap of a vacuum tank just has been opened.And this deformation usually is random, and deformation degree and deformation position in the Cast Strip are uncertain, and for this Cast Strip, should be level and smooth when the crystallizer cavity moves and not have deformation at it originally.

This thermal-induced deformation most probable occurs near the input area of crystallizer cavity, stands the influence of the rapid heating of the motlten metal that enters the crystallizer cavity of motion or just entered the crystallizer cavity first in the Cast Strip of this place motion.Close input area motlten metal takes place or begins initial solidifying, and in this process of setting, the distortion of Cast Strip may cause the cast article that contains crack, pit or alloy compositions segregation.These defectives in the cast article then can cause its intensity, and formability reaches problems such as outward appearance.

At United States Patent (USP) 2,640, in 235 (the 7th hurdles), C.W.Hazelett discloses a kind of upper and lower cooling package that is used for the upper and lower salband.The mode of operation of these cooling packages is identical, and simultaneously, each cooling package comprises a plate of being made by certain suitable material that is easy to be magnetized, and this plate constitutes the soft magnetic core of an electromagnet.When making a plate magnetization owing to electric current, its effect is that a band is pulled to oneself.In order to prevent to have adopted copper or brass shim spacer with this motion to plate, these pads make and form a chamber between band and plates.Cooling water is introduced in this chamber so that salband.Although cooling water is introduced into sizable pressure, and be enough to make band distortion usually, in this patent specification, then point out, owing to the magnetic sheet of support belt leans on rigid gasket securely, so can not produce this distortion.This specification is pointed out, utilizes this method, can be with the band cooling, and simultaneously it being led and supporting this band makes it not deform, thereby can guarantee the accurate specification of product.

People such as William Baker are at U.S.Patent 3,933, disclose a kind of equipment that is used for continuous casting metal strip between the Cast Strip of motion in 193.By means of the attraction that negative pressure caused being added in the reverse side of Cast Strip or the Cast Strip closely being supported on area supported by the magnetic force that is used for same purpose.

People such as Olivio Sivilotti are at United States Patent (USP) 4,190, claim in 103 (on the 2nd hurdle, 38-44 is capable): " therefore, among described equipment embodiment, the Cast Strip is drawn out by means of the surface of the negative pressure in the water-filling casing with respect to close supporting member in the above.Another setting provides a magnetic component, acts on the ferromagnetism Cast Strip by ferromagnetic supporting member, and the Cast Strip is remained on the required path.”

Surrenderee of the present invention, Hazelett Strip-Casting Corporation, once carried out experiment, the test reverse side sliding-contact of fixing electromagnetism supporting strap wing shape slide block and motion Cast Strip, but from the angle of excessive wear and frictional force, they do not have the performance that suffices to show that its continuation.And these electromagnetism wing shape slide blocks can not successfully keep the Cast Strip of moving or be stabilized under the straight state reliably.

We find, C.W.Hazelett, people such as Sivilotti, perhaps the magnetic devices described in the patent mentioned in front of people such as Baker does not obtain practical application in the continuous casting industry of motlten metal, because magnetic attracting force as the function in the space (gap) between Cast Strip or band and the magnetic devices, promptly be added in the Cast Strip or with on pulling force weaken too soon and/or too rapid, and this power be originally attempt will motion the Cast Strip or the thermal-induced deformation of band partly be withdrawn into predetermined required straightened condition.The magnetic attraction of these existing apparatus (pulling force) can not stretch out the bigger gap of leap, and the Cast Strip or the steel band that therefore are unsuitable for significantly departing from required straightened condition owing to thermal-induced deformation partly are withdrawn into straightened condition.Here exist a kind of we be referred to as shortage or the deficiency of " attraction of stretching out " (reach-out attraction), i.e. the shortage or the deficiency of " pulling force that stretches out ".

Be referred to as " attraction of stretching out " (that is) importance, " pulling force that stretches out ", people such as Baker were not both disclosed does not propose any suggestion yet to we found.

In our invention, permanent-magnet material by the uniqueness described herein that is provided with in magnetic circuit comes generator to stretch out power, as previously described, in order to stretch out and to cross over the pole surface of magnetic circuit and one by moving of making of soft magnetism ferromagnetic material, space (gap) between the flexible thin shape heat conduction Cast Strip, pull to pole surface so that the Cast Strip is taken place the part of thermal deformation, to keep the Cast Strip to be positioned at the limited range of the required stable straightened condition of regulation, will illustrate as following, in this state, the Cast Strip is supported by the hydrodynamics that the cooling agent stream that injects is provided, thereby, float in cooling fluid that is injected into and the repulsive force that cooling fluid applied that advances fast the Cast Strip of stabilisation, when being suspended under the stable straightened condition, along its predetermined path movement, and the Cast Strip neither slides with respect to fixing object and also is not subjected to the wearing and tearing of fixed object, but moves along the moisture film that not have basically to rub.

In preferred embodiments more of the present invention, comprise a plurality of hydromagnetic (hydro-magnetic) devices of lining up array, wherein, the cooling fluid of injection stream imports the head tank of conduct in the face of the throttle nozzle of Cast Strip reverse side by the passage of fixed restriction.These cooling agent streams are from spraying near pole surface or by the throttle nozzle that pole surface is surrounded, overflow from the head tank cooling agent of (ejection) of utilization applies repulsive force to the reverse side of Cast Strip, the cooling agent that is ejected has the shape of the cooling agent film of the rapid movement that radiates from head tank, and travels forward between the reverse side of Cast Strip of motion and pole surface.The film of these rapid movements is with the Cast Strip cooling and apply a fluid dynamic educational level that promotes the reverse side of motion Cast Strip, in order to support the Cast Strip and to keep the Cast Strip to leave the certain distance of refrigerant injection pole surface (floating) slightly, simultaneously, by stretching out from these magnetic poles and crossing over the powerful magnetic attracting force (pulling force) that described gap arrives the motion Cast Strip, the Cast Strip is stabilized in straightened condition.Thereby the liquid coolant that pumps into is by twice throttling.In the time of in its passage by fixed restriction is injected in the face of the head tank of Cast Strip, once by throttling.When it flows out from these head tanks and passes through around the pole surface of head tank by throttling once more.In fact, cooling agent passes gap ejection between Cast Strip and the pole surface with the form of the cooling agent film of advancing fast, and these pole surface play a part to be similar to the refrigerant injection surface around head tank.

Comprise the strong permanent magnet that the permanent-magnet material by uniqueness constitutes in the hydromagnetic device in these arrays.These magnets that are arranged in magnetic circuit in each array provide the magnetic attracting force that stretches out with abnormal characteristic, and we believe that they are very crucial for the success of disclosed embodiments of the invention.The extremely strong magnetic potential that is provided by this permanent magnet (it has high maximum magnetic energy product, and unit is megagauss-oersted) according to our viewpoint, is not the sole cause of successful operation in these arrays of hydromagnetic device or the magnetic circuit in " pad ".We think that another the very crucial feature for they successful operations is their extremely low demagnetization magnetic conductivity, and this demagnetization magnetic conductivity is so low, so that it big or smallly has the identical order of magnitude with air with the demagnetization magnetic conductivity of water or vacuum.This low-down demagnetization magnetic conductivity, as disclosed, make the flexible thin heat conduction Cast Strip that one of the pole pair of pole surface and magnetic circuit contains the motion of soft magnetism ferromagnetic material apply extremely strong magnetic attraction (pulling force), these attractions then from pole surface extend (stretching out) distant, and extend through gap (space) between the Cast Strip of the pole surface that is filled with air and/or water and motion.These magnets in magnetic circuit provide the pole surface array of a coplane, these pole surface north and south poles alternately arrangement plane to the reverse side of the flexible thin heat conduction Cast Strip of a motion that contains the soft magnetism ferromagnetic material.

In a preferred embodiment of the invention, we utilize the intrinsic variable repulsive force (thrust) of cooling agent that pumps into, described cooling agent is by the ejection of the throttle nozzle of hydromagnetic device, and the cooling agent film of advancing fast of crossing the Cast Strip reverse side that pole surface affacts motion is provided.These repulsive forces descend comparatively fast as the function in the space (gap of increase) of the increase between the pole surface that is flow through at Cast Strip reverse side and the cooling agent film of advancing fast.These repulsive forces and the attraction of stretching out (pulling force) balance on the Cast Strip that is acted on motion by pole surface at same position place, this attraction descends relatively slowly as the function in the space that increases.The descend repelling effect faster and the slower useful interaction of stretching out balance between the magnetic pull that descends makes the Cast Strip of motion suspend, because the balance of pulling force/thrust makes the Cast Strip of motion be stabilized in the restricted portion reliably.Thereby the Cast Strip is compelled to suspend and is stabilized in straightened condition, supports the supercharging cooling agent of (floating) throttling in head tank and the cooling agent of the rapid movement of advancing in the space between the pole surface of Cast Strip reverse side to overflow on the film.

The removing nozzle (sweep nozzle) that is combined with particular design in these hydromagnetic devices is used for spraying auxiliary cooling agent with an acute angle to the Cast Strip, form a rapid movement coolant layer along the one-way flow of Cast Strip reverse side, to the auxiliary cooling in gap, Cast Strip, the cooling agent film of advancing fast of having crossed pole surface is turned to, change its direction and its removing the most at last.

Thereby, by with this The pulling force that stretches out(reach out pull) is with respect to the fluid force educational level of the injection liquid coolant that is ejected by throttle nozzle in the hydromagnetic device Balance, the reverse side of Cast Strip to motion applies in the position near pole surface simultaneously Thrust,, the Cast Strip of motion is stablized with the required uniformity and the glacing flatness of regulation so that the Cast Strip is stabilized in suspension (floating) state that leaves pole surface and do not contact with it.

This act on the power of stretching out powerful on the thin Cast Strip of magnetic soft ferromagnetic material with traditional material, or even the behavior difference of the magnet of aluminium nickel cobalt 5 systems, when in described magnetic circuit, producing tangible gap, for example during the gap of 1.5mm (0.060 inch), these traditional materials will lose its most of attraction.

We expect, any permanent-magnet material all can successfully be realized embodiments of the invention, condition is, these materials are installed in the magnetic circuit as permanent magnet, this magnetic circuit comprises the ferromagnetic material of soft magnetism, this ferromagnetic material constitutes opposite polarity magnetic pole array, its pole surface can be faced the reverse side of the Cast Strip of a motion, simultaneously this pole surface nestles up throttle nozzle (for example these pole surface around or at the edge of throttle nozzle), these nozzles can be in the face of the reverse side of Cast Strip, wherein, these pole surface and pole pieces can apply the magnetic attraction (pulling force) that stretches out to the flexible thin heat conduction Cast Strip of a motion, this Cast Strip includes the ferromagnetic material of soft magnetism, wherein, the initial value of these magnetic attractions that stretch out on pole surface is enough strong, simultaneously, act near the magnetic attraction that stretches out on the Cast Strip of array, function as the gap that increases to 1.5mm (0.060 inch) between Cast Strip part and the pole surface always, descend quite slowly from its initial value, make the Cast Strip be forced to stably be bearing in the suitable scope of a glacing flatness and gap clearance, simultaneously the Cast Strip is left pole surface and is suspended in the cooling agent that is pressurized by hydrodynamics ground and flows, this cooling agent stream is the film of a kind of quick operation that the head tank from throttle nozzle shoots out by throttle nozzle ejection and conduct, and this film flows through in the gap between pole surface and Cast Strip reverse side.

Can be provided for the whirligig of rotating permanent magnet,, they not caused damage by reducing pulling force can mount and dismount very wide flexible thin Cast Strip significantly so that in needs, reduce their powerful pulling force that stretches out to the Cast Strip.Perhaps, can go out along separate routes so that significantly reduce its pulling force, so that suitable processing is carried out in the Cast Strip by the magnetic flux that a suitable shunt will send from magnet to the Cast Strip.

The present invention in the continuous casting machine since the caused long-standing problem of thermal-induced deformation of annular flexible thin heat conduction Cast Strip of motion successfully proposed suggestion or overcome basically and eliminate these problems.

The term that is used for the heat conduction Cast Strip that mainly is formed from steel herein " approaches " and is meant thickness less than 1/10th inches (about 2.5mm), and usually less than the Cast Strip of 0.070 inch (about 2.0mm).

The magnetic conductivity of soft magnetism ferromagnetic material is defined as B/H, and wherein, " B " is the magnetic flux density of material, and unit is Gauss, and " H " then is the magnetic coercive force of material, and unit is an oersted.Used term " soft magnetism ferromagnetic material " refers to and has at least 500 times of maximum permeabilities to the material of the magnetic conductivity of air, water or vacuum in the literary composition, and the magnetic conductivity of air, water or vacuum is about 1.For example, the common transformer steel when at magnetic flux density B be 6000 Gausses, its magnetic coercive force H when being about 1.1 oersteds and measuring its maximum permeability be about 5,450, referring to CRC Handbook of Chemistry and Physics, 66th Edition, 1985-1986, E-155 page or leaf.Used phrase " soft magnetism " is meant that this material is magnetized relatively easily or demagnetizes in term " soft magnetism ferromagnetic material ".Therefore, adjective " soft " is opposite with adjective " firmly " here, and the latter is used for the material that the big magnetic coercive force of requirement magnetizes and demagnetizes, thereby this material is difficult to magnetization and demagnetization.Usually, be used for constituting the common transformer steel of thin Cast Strip of twin-belt caster and the scope that the rolling mild carbon steel strip of 1/4th hardness (quarter-hard) belongs to " soft magnetism ferromagnetic material ".

Nomenclature in American Society for Testing Materials: A 340-39, The symbol of relevant magnetic test Number and the definition standard terminology (ASTM:A 340-39, standard Terminology of Symbols and Dekinitions Relating to Magneic Testing) in, the definition of " residual magnetic induction response, Br " is " when magnetic material stands the cyclic magnetization condition of symmetry, corresponding to the magnetic induction value of zero magnetizing field ".

The magnetic conductivity of retentive material is the Δ B/ Δ H when the relevant useful part of demagnetizing curve is measured, and demagnetizing curve itself is defined within the B-H hysteresis curve of second (the 4th) quadrant that is arranged in normal hysteresis loop, that is, and and BH loop or BH curve part." normal hysteresis loop " is defined in the nomenclature of above-mentioned American Society for Testing Materials (ASTM).

By with reference to the accompanying drawings the detailed description of preferred embodiment that is provided being will be understood that other purpose of the present invention, situation, characteristics and advantage, these embodiment and accompanying drawing only are used for illustrative purposes rather than limitation of the present invention, and these accompanying drawings there is no need to draw in proportion but are used to be illustrated more clearly in principle of the present invention simultaneously.Particularly, will also describe by the bottom balladeur train of this casting machine usually by relevant biobelt casting machine below.Corresponding symbol is used for parts and part like the representation class in all accompanying drawings.Big outline line arrow points is with respect to " downstream " direction of the crystallizer cavity of motion or the longitudinal direction in crystallizer space (upstream-downstream orientation), therefore, these arrows are represented the direction of the crystallizer spatial flow of metal that solidifies and the crystallizer cavity motion that enters motion from inlet to exported product stream.The flow direction of liquid coolant is identical with the direction of frozen metal usually.The local flow of liquid coolant is represented with simple single line arrow.

Fig. 1 is when when the upper outer of upstream side is observed, the perspective view of double belt casting machine.This casting machine is a broad, the illustrative examples of medium thin-belt conticaster, and the present invention can extremely be advantageously used in this casting machine.

Fig. 2 is when observing from the downstream, top, in an embodiment of the present invention, is positioned at the part perspective view of the amplification of bottom balladeur train hydromagnetic device.For more clearly expression, in Fig. 2, the flexible Cast Strip of motion is partly disconnected expression.Fig. 2 is the view of observing along the II-II direction among Fig. 3 and Fig. 4 and the 4A.

Fig. 3 is the top view of hydromagnetic device, and wherein three are shown in Fig. 2.In Fig. 3, for the purpose of clearly representing, Cast Strip and their pulley drum have been omitted.

Fig. 3 A is the close-up illustration of a part among Fig. 3, the flowing with respect to the reverse face in bottom of the Cast Strip, bottom of expressing that be used for schematically showing liquid coolant.

Fig. 4 is the longitudinal sectional view of observing from the side of casting machine, expression when other parts of the following balladeur train of its quilt belt casting machine as shown in Figure 1 around the time a typical hydromagnetic device or the sub-assembly or the array of a hydromagnetic.The movement edge portion baffle plate of casting machine is shown among Fig. 1, in Fig. 4, does not for the sake of clarity illustrate.

Fig. 4 A and Fig. 4 are similar, are used for and the upstream side pulley drum of nipping but express one, are also referred to as the interactional hydromagnetic device of the belt wheel roller of nipping.

The enlarged drawing of the part of Fig. 4 B presentation graphs 4A is used to represent the embodiment of a remodeling of the present invention, and it comprises that " burner (afterburner) again " cooling agent in a flat sensing downstream removes nozzle.

Fig. 4 C is the enlarged drawing of the part of Fig. 2, and " burner again " cooling agent that is used for presentation graphs 4B is removed nozzle.

Fig. 5 is a part right-angle view that combines with fragmentary cross-sectional view of equipment in the following balladeur train of an enforcement casting machine of the present invention seen when the upstream is observed downstream.In Fig. 5, three VA respectively, the zone of VB and VC sign be by among Fig. 4 B respectively by observation line VA-VA, the zone that VB-VB and VC-VC identified.

Fig. 6 is the zoomed-in view of the part of Fig. 5, represents a typical magnetic circuit, and this magnetic circuit has a thin cooling agent film of advancing fast, and this cooling agent film passes the space between the Cast Strip reverse side of a pole surface and a motion.Here, in order more clearly to be illustrated, amplified the relative thickness of this cooling intermembrane space.

Fig. 7 is a curve map, is used to illustrate the function as the distance in Cast Strip of moving and the gap between magnet-nozzle pole surface (edge of coolant pressure groove), the balance of the Cast Strip of motion or stable.In other words, Fig. 7 represents that pulling force/thrust is in following balance between the two: (i) magnetic attracting force that stretches out more slowly of suppression ratio, inside pulling force can be referred to as and (ii) the descend cooling agent pump into faster and the repulsive force of thin cooling agent film at a high speed, outside thrust can be referred to as.Simultaneously, in order to contrast and more clearly to be illustrated, provided the very fast and undesirable decline of ratio of the attraction that is provided by aluminium nickel cobalt 5 magnets among the figure.

Fig. 7 category-A is similar to the left part part of Fig. 7, and its horizontal proportion amplifies 6 to 1.Wherein also comprised Fig. 7 ' A and 7A ", be used to describe.

Fig. 8 is the vertical vertical cross section when side, the crystallizer cavity of the motion of balladeur train zone is observed, and expression hydromagnetic apparatus array promptly, is positioned at along the hydromagnetic device of each position of the length of the crystallizer cavity that moves.One of these hydromagnetic devices are to show in the mode that flexibility is installed.

Fig. 9 is the view that is similar to Fig. 8, but its expression be another preferred embodiment of the present invention, wherein, replaced by the backing roll that is positioned at the downstream shown in Fig. 9 at the hydromagnetic array that is positioned at the downstream shown in Fig. 8.

Figure 10 is a view that is similar to Fig. 8, but has represented the another one preferred embodiment, wherein, shown in Fig. 8 be arranged in the downstream on two hydromagnetic apparatus arrays of balladeur train replaced by the backing roll that is positioned at the downstream shown in Figure 10.At two arrays relative with backing roll of the following balladeur train that is arranged in the downstream shown in Figure 10 are nonmagnetic body cooling agent pads.

Figure 11 is the vertical cross section of an amplification when the favourable point of the upstream side of Fig. 5 is observed downstream, represents a permanent magnet device that can be rotated by a fluid-operated magnet rotating mechanism.Shown permanent magnet device is in the position of open circuit or " breaking ".

Figure 12 is the vertical cross section of the point favourable from the outside of Fig. 4 equipment shown in Figure 11 when observing.Figure 12 is the section along the XII-XII intercepting of Figure 11.

Figure 13 represents that in another embodiment of the present invention adopting movably, the ferromagnetic bypass of soft magnetism replaces the rotatable permanent magnetic device shown in Figure 11 and 12.Figure 13 is an oblique view when the advantage point of Fig. 5 is observed basically, expression diagrammatically is positioned at the hydromagnetic apparatus array of the below, Cast Strip of a motion, have the groove profile of tooth bar that the ferromagnetic material of a soft magnetism is made, it plays a part a bypass, and represented here is that it is in the position (pole surface is demagnetized) of " breaking "

Figure 14 is the view that is similar to Figure 13, but its represented bypass is in the position (pole surface is magnetized) of " leading to ".

Figure 15 represents the hysteresis curve of two kinds of different permanent-magnet materials: the most preferred permanent-magnet material that aluminium nickel cobalt 5 and back will be described in detail, we are used for most preferred embodiment of the present invention with this permanent magnet.

Figure 16 is a vertical vertical cross section when observing from the casting machine side, another one hydromagnetic device or sub-assembly in the expression hydromagnetic pad array.Shown hydromagnetic device is surrounded by other parts of the last balladeur train of as shown in Figure 1 belt casting machine.Down nip Fig. 4 A of belt wheel of Cast Strip and bottom is similar for Figure 16 and expression; Figure 16 then is illustrated in last Cast Strip in the collaborative combination of the existing another kind of structure that has one embodiment of the present of invention and the top belt wheel of nipping.

Figure 17 is the phantom of an amplification, and expression is according to a plurality of magnetic circuits of existing another kind of structure, and this structure has a thin cooling agent film of advancing fast, and this film passes the gap between the reverse side of Cast Strip of pole surface and motion.The left part of this view is the indicated part of the A-A among Figure 16 and Figure 19.The right part of Figure 17 is along A '-A ' intercepting.For more clearly expression, amplified the relative thickness of cooling agent film here.

Figure 18 is the fragmentary cross-sectional view that is similar to the amplification of Figure 17, and still, Figure 18 is away from the more view of downstream part of the belt wheel wing of nipping, and the left part of Figure 18 and right part partly are arranged in Figure 16 and 19 and locate along B-B and B '-B ' respectively.

Figure 19 is the part enlarged drawing of Figure 16, is used for representing in detail the style of rotatable body assembly.

This specification will describe at the biobelt casting machine, and the characteristics of this casting machine are to have upper and lower balladeur train, are used to rotate upper and lower Cast Strip.For the ease of explaining, will describe at following balladeur train.In a biobelt casting machine, the metal that is solidifying is normally straight along its channel line of advancing.In single band casting machine (not doing explanation here), channel line can be followed one and slightly become crooked path.And, in the biobelt casting machine, channel line can be substantially straightly along the longitudinal extension of casting machine, and that described band can be along casting machine on a position of crystallizer cavity is laterally slight curving.For all these situations, the channel line that is formed by the position of pole surface or the array of its guide can be described as " coplane array " or " planar array ".

Can move along a channel line of following the path that slightly is crooked although one " put down " band, when its when channel line is passed whole channel line with required glacing flatness, can think that this flat rubber belting is under the straight condition.And the flat rubber belting of transverse curvature slightly on certain part of channel line also can considered to be under the straight state.One is used to guide along the pole surface array of the Cast Strip that channel line is moved with required glacing flatness and can be called as " the coplane array " of pole surface or can be described as " planar array ".

Fig. 1 be the biobelt casting machine 36 of a broad from the upstream, the view observed of top and the outside.Following balladeur train is denoted as L and goes up balladeur train and be denoted as U.By a motlten metal feed arrangement (not shown) known in the conticaster technology, motlten metal is introduced into the crystallizer cavity of motion or the upstream end 49 of crystallizer space C (Fig. 4,4A, 5,6,8,9 and 10).Schematically mark the introducing of motlten metal with a big hollow arrow 37 in Fig. 1 left side.Discharge (arrow 57) at the continuous casting product shown in the right of Fig. 1 from the port of export of the crystallizer cavity of motion.

The downside of the crystallizer cavity C of motion and the bottom that upside is rotated respectively and upper, annular, flexibility, thin heat conduction Cast Strip 50 and 52 constraints.In a preferred embodiment of the invention, Cast Strip the 50, the 52nd is made by the soft magnetism ferromagnetic material.For example, by metal material as

The rolling low carbon steel of hardness is made.Can carry out suitable processing known in the art, for example sandblast and/or coating to the front surface of Cast Strip.As known in the art, the both sides of the crystallizer cavity C of motion are retrained by the whole loop chain edge dam 54 of two known rotations.Following Cast Strip 50 and blockchain 54 shown in motion arrow 55, are held 49 relative following (nipping) belt wheel 56 and the following belt wheel relative with the port of export of motion crystallizer cavity 58 rotations around one with the inlet (upstream) of motion crystallizer cavity.Last Cast Strip 52 is around upstream, a top (nipping) belt wheel 60 and 62 rotations of downstream, top belt wheel.The structure of this biobelt casting machine is known with operating in the banding pattern casting machine technical field.If the reader need be about the more information of this casting machine, can be with reference to people's such as Hazelett patent.

The viewpoint of Fig. 2 is marked by chain-dotted line II-II in Fig. 3 and Fig. 8.Shown in down Cast Strip 50 by one totally by the array guiding of the 51 hydromagnetic devices 38 that mark.Array 51 can be known as a hydromagnetic pad.Each hydromagnetic device comprises a pole pieces 39, this pole pieces 39 with respect on the motion crystallizer cavity C-downstream direction (arrow 61) longitudinal extension.In array 51, these elongated pole pieces 39 are parallel to each other, are spaced.Their top surface provides the coplane array of a pole surface 34.Determine elongated space 66 between these elongated pole pieces 39, this space is as shown in the figure with respect to crystallizer cavity longitudinal extension.

Elongated pole pieces 39 is made of the soft magnetism ferromagnetic material, and magnetically soft steel for example is as 430 type straight-chromiun stainless steel.Cast Strip 50 is supported from the fluid dynamic educational level that liquid coolant provided of throttle nozzle ejection, presses close to pole surface 34 motions.To make an explanation to throttle nozzle after a while.

In the array 51 of hydromagnetic device 38, we have installed the permanent magnet 32 of many relative compact, and these permanent magnets 32 have north magnetic pole and south magnetic pole, mark with N ' and S ' respectively in Fig. 2.These magnets are inserted in the slender space 66 between the parallel elongate pole pieces 39 of the consecutive intervals in array 51.Best, in each space 66, has a permanent magnet 32 at least, so that in whole array 51, as will be from understanding Fig. 3 and 5, each pole pieces 39 (two outermost pole pieces in array shown in Figure 3) in array has the permanent magnet pole of a pair of identical polar in the face of its offside.The permanent magnet pole of these identical polars is to having the north that replaces (N ') utmost point and south (S ') utmost point of crossing over array 51.Therefore, as shown in Figure 2, the pole pieces 39 of on the left side has a pair of arctic permanent magnet pole N ' in the face of its offside.Next continuous pole pieces 39 at Fig. 2 middle part has a pair of South Pole permanent magnet pole S ' in the face of its offside.Then, next the continuous pole pieces 39 on Fig. 2 the right has a pair of arctic permanent magnet pole N ' in the face of its offside, or the like, cross over array 51 thus.

The result of this arrangement of permanent magnet 32 is, cross in the continuous hydromagnetic device 38 of array 51 in the space, the pole surface 34 of pole pieces 39 alternately has north (N) utmost point and south (S) utmost point, applies the powerful attraction (pulling force) (Fig. 2,5 and 6) of stretching out on the Cast Strip 50 of motion.

As shown in Figure 3, many permanent magnets 32 are arranged in array 51, five for example in Fig. 4, have been expressed, as the most clearly showing among Fig. 3, these permanent magnets 32 are inserted into the length longitudinal separation that is arranged in along elongated pole pieces 39, each slender space 66 on vertical positions aligning, in this array 51, first magnet 32 in each space 66 is positioned at the upstream extremity 118 near the polar surfaces 34 of two adjacent pole pieces 39.Last of a plurality of magnets is positioned at the downstream 120 near the pole surface 34 of two adjacent pole pieces 39 in each space.In Fig. 4 A of a nose shape array 51n of expression, five magnets in each space 66 adjoin each other to avoid and the belt wheel wing 128 mutual interference mutually in a downstream near nose shape array.

In Fig. 6, dotted line 30 one of expression are positioned at the complete magnetic circuit of Fig. 6 center and are positioned at the part of two other magnetic circuit on left side and right side.Gap 75 (at interval) size between the relative thickness of Cast Strip 50 and pole surface 34 and the Cast Strip is exaggerated, so that make diagram clear.Complete magnetic circuit 30 is from the arctic N ' of a permanent magnet 32 of Fig. 6 center.For example, five magnets are arranged in each space 66, for each space 66 and two adjacent pole pieces 39, this magnetic circuit 30 is represented any one in five such magnetic circuits.This magnetic circuit extends into first pole pieces 39 of hydromagnetic device 38 from magnetic pole N ', and extends to first pole surface 34 thus in first member, and here, the strong magnetic flux gesture of magnet makes the powerful first magnetic pole N magnetization that is positioned at this first pole surface.This magnetic circuit extends across first gap 75 and enters soft magnet tape 50 from this first pole surface 34, and extends to second gap 75 in this band subsequently.This magnetic circuit extends across second gap 75, and enters the pole surface 34 on the adjacent pole member of adjacent hydromagnetic device 38 in the array 51, is being entered by the magnetized powerful S place, the South Pole of the strong magnetic flux gesture of magnet 32.Magnetic circuit extends to magnetic pole S ' in second pole pieces 39 and enters this S magnetic pole.This magnetic circuit finishes from its S ' best N ' utmost point in magnet.

As the example of a suitable setting, as shown in the figure, the pole pieces 39 in the array 51 is spaced equably with its mid point.The mid point of pole pieces 39 can be for example to the interval of mid point about 3/4 inch to about 2 inches scope.These elongated pole pieces for example can for about 1/2 inch thick, between adjacent pole member, determine elongated space 66 with respect to crystallizer cavity longitudinal extension.In Fig. 6, owing to the pole surface 34 of pole pieces 39 towards it narrows down slightly, so these spaces seem wide slightly near 50 places, Cast Strip.Permanent magnet 32 in an embodiment extends to N ' utmost point from S ' utmost point as shown in the figure.

Each permanent magnet 32 can comprise many independent permanent magnets, and these independent permanent magnets suitably superpose in the mode of the arctic to the South Pole, and in series the end is to end arranged cells; And/or many independent permanent magnets, these independent permanent magnets connect sidepiece with sidepiece and arrange side by side, like this so that very powerful magnet 32 is provided, this magnet 32 in its relative end or surface 33 (Fig. 3 A and 6) have total north (N ') utmost point and south (S ') utmost point, and the magnetic line of force is from described end or surperficial 33 pass.If described magnet is made by corrosion-prone material, so preferably to these magnet gap plating, in case anti-corrosion, for example nickel plating.As Fig. 2, shown in 3,5 and 6, these permanent magnets 32 are designed to cuboid, and the S ' of portion's magnetic line of force is approximately 1.5 inches to the direction of N ' and grows to 1 inch long, about at least 1 square inch of its cross section within it.

End surfaces 33 with magnet 32 of N ' utmost point and S ' needn't accurately contact with the side surface of pole pieces 39 is actual.The side surface adjacency of 33 need of these magnet end surfaces and adjacent pole member.Term " adjacency " can comprise real contact here.If between the side surface of end surfaces 33 and pole pieces 39, have any interval, then should be enough little on flux loop 30 directions at the spatial joint clearance that forms between end surfaces 33 and the pole pieces 39, make and in each complete magnetic circuit 30, have only two effective gaps 75.Have little the air gap or do not have under the situation of the air gap in pole surface 33, by by the powerful magnetomotive force that unique property provided of permanent magnet 32 magnetized each total complete magnetic circuit 30, to have mysterious ability, " stretch out " and pass gap 75, the mode that is used for can't realizing with the electromagnet of conventional magnet or actual size applies powerful tractive force on the Cast Strip 50 of motion.Along with the increase in gap 75, this attraction weakens relatively slowly, and this will make an explanation further combined with Fig. 7 and Fig. 7 A.

Please note Fig. 6 again, can see, be filled with the relatively thin film 114 of the liquid coolant of relative rapid movement in two gaps 75 in each complete magnetic circuit 30, now it is made an explanation.Utilize the cooling agent supply system shown in Fig. 4 and the 4A, liquid coolant 93 is pumped in the pipe path 92 of longitudinal extension in each pole pieces 39.Liquid coolant 93 is generally the water that contains antirust agent, and liquid coolant 93 to remove particle, is pumped to the collector pipe 100 of horizontal expansion in the balladeur train L of bottom by suitable filtration then.In Fig. 1, expressed the end of this collector pipe 100.The cooling agent 93 that pump is got in collector pipe 100 can be supercharged to more than for example about 30 pound per square inches (p.s.i.), but in specific plant equipment, supercharging can not be too big, so that making the Cast Strip leave gap 75 suspends, 75 places obtain in the gap stretches out magnetic attraction and can revolt thermal deformation, forces to stablize the Cast Strip.Supply pipe 98 (only showing one) extends out from collector pipe 100.Each such supply pipe is connected on the passage that the diagonal angle gets out in pole pieces 39 96, and passage 96 links to each other with a pipe path 92 within the pole pieces.

The shape of the elongated pole pieces 39 shown in Fig. 4 A is compared with the shape shown in Fig. 4 to some extent and is changed, surpass the zone 110 of nipping so that the elongated magnetic pole with Fig. 4 A structure can upstream be given prominence to, thereby its nose 39n can insert down in the groove 127 (Fig. 4 A) between the wing 128 on the belt wheel roller 56 of nipping.This of inlet 49 nips that this inlet is passed by one in zone 110 in Fig. 4 A and the axle 111 of the belt wheel 56 of nipping down and the chain-dotted line that also passes the axle (not shown) of the belt wheel 60 (Fig. 1) of nipping show.

Many supply pipes 98 evenly are spaced with one or two half inch center distance side by side along collector pipe 100, and in order to adapt to this crowded condition, the cross section of these supply pipes can be oval, in order to suitable fluid ability to be provided.The pipe path 92 of longitudinal extension can be counted as a pressure inlet in elongated pole pieces 39, because it provides the cooling agent 93 that pumps into to a plurality of custom-designed throttle nozzles, described throttle nozzle comprises the path 90 of fixed restriction and in the face of Cast Strip and by the head tank 102 of pole surface 34 as surrounded by edges.The upstream and downstream end of each pipe path 92 is inserted into connector at 94 places as shown in Fig. 4 and Fig. 4 A.

The cooling agent 93 that pumps into from pipe path 92 enters the path 90 of fixed restriction, and guiding is flowed the head tank 102 of 97 entering surfaces to the Cast Strip reverse side by the cooling agent that pumps into of throttling.At Fig. 2,3,3A has expressed many such head tanks in 4 and 5.They are expressed as ellipse, and along the longitudinal tensile strain of pole surface 34.For example, head tank 102 pole surface longitudinal lengths are 3/8 inch, and be approximately 3/16 inch dark, 3/16 inch is wide.These oval head tanks 102 closely are spaced along the length of pole surface 34, for example at their oval-shaped downstream and about 1/8th inches of the interval between the upstream extremity separately; Thereby as shown in the figure, for example vertical per inch of pole surface 34 has two head tanks (that is, the center to center spacing is about one and half inches).For example, as shown in the figure, each head tank 102 has an about area surface of 0.06 square inch to the surface, Cast Strip.

Throttling cooling agent stream 97 in the head tank 102 is to the reverse side applied thrust (repulsion) of the Cast Strip 50 of motion.Discharged from each head tank by the cooling agent of throttling, go into the gap 75 to external radiation from head tank with the form of the liquid film 114 of advancing fast, and pass through the pole surface 34 that forms the head tank edge.Except the thrust of Cast Strip 50 reverse side that are applied to motion by throttling supercharging cooling agent stream 97, each liquid film of advancing fast 114 also applies dynamics thrust (repulsion) to the reverse side of Cast Strip.Any increase in the adjacent gap 75 of causing along with any deformational displacement owing to a regional area of the Cast Strip 50 of leaving the pole surface 4 that is associated, these hydrodynamics that produce around it in each head tank 102 neutralization push away (scolding) power and can reduce (almost instantaneous) immediately.

One of purpose of each throttling path 90 is to make coupled head tank 102 isolate (completely cut off, separate) with the heavy connection of pipe 92 that links to each other, and the liquid coolant 93 of supercharging is sent into head tank from pipe path 92.By means of this isolation, near the pressure of the cooling agent 93 any variation (because near instantaneous deformation displacement of regional areas the Cast Strip 50 of motion) of pressure that enters the cooling fluid stream 97 of specific groove 102 can not influence in the pipe path 92.Therefore, can compulsory backflow effeet not take place owing to the local pressure variation that instantaneous time in entering the cooling agent stream 97 of any head tank can take place.Thereby each head tank 102 works with respect to adjacent groove independently with its cooling agent stream 97 and its radius flow film 114.The pressure of the supercharging cooling agent 93 of the behavior of any fluid 97 and any liquid film 14 in can appreciable impact pipe path 92 can any chamber pressure groove of appreciable impact or the effect of any other cooling agent film yet.

In order to realize this isolation, the internal diameter (I.D.) of throttling path 90 (can be counted as very long fixing throttle orifice) had better not greater than for example about 1/16 inch (about 0.063 "); and owing to may be had less than about 0.04 by the accidental opening that blocks " I.D., so preferably be not less than about 0.04 inch.As shown in Figure 6, path 90 about 3/4ths inches long, about 0.045 inch of I.D..

As the example of suitable operating parameter, the pressure of the liquid 93 in the collector pipe 100 (Fig. 4 and 4A) can be more than about 30p.s.i, but as mentioned above, can not be excessive.Example that is used for explaining below, collector pipe pressure are made as in the scope of about 100p.s.i. to 110p.i.s. (scopes of about 7 crust).Because hypothesis is in the relative not too significant pressure drop with generation in the interface channel 96 of supply pipe 98, so the pressure of the cooling agent 93 in each pipe path 92 is in the scope of about 100p.s.i. to 110p.s.i..

For convenience of explanation, suppose that at first motion Cast Strip 50 is stablized in place by pulling force/thrust-balancing in Fig. 6.The motion Cast Strip is supported with the relative thin film 114 that passes the cooling agent of advancing fast that overflows in gap 75 from head tank 102 by throttling liquid stream 97.According to so stable Cast Strip primary condition, have only suitable liquid stream 97 to enter groove 102." liquid stream " is meant the value (that is amount) of the coolant volume of time per unit at this.Therefore, for example, under these primary condition, suppose in throttling path 90, to produce about pressure drop of 30 to 40p.s.i..Therefore, for example, the pressure that enters the liquid stream 97 of head tank 102 is that about 100 to 110p.s.i. collector pipe pressure deducts about pressure drop of 30 to 40p.s.i., thereby in these primary condition of the settling position of motion Cast Strip, the pressure of liquid stream 97 should be in about scope of 60 to 80p.s.i..

Now, for the ease of explaining, suppose to begin to take place thermal deformation, the regional area that makes the motion Cast Strip 50 among Fig. 6 is away from pole surface 34, thereby makes gap 75 become big, causes the thickness of the film 114 of advancing fast to increase, the overflow of these liquid films 114 that radiate from head tank 102 increases sharply, the liquid stream 97 that enters head tank increases, and the pressure drop that produces in the throttling path 90 that forms pressure drop is increased sharply, and for example about 40 to 50p.s.i..Thereby, the pressure that enters the liquid stream 97 in the head tank 102 becomes hypothesis about 50 immediately to 70p.s.i., and the pulling force that stretches out of a geostationary magnetic attraction in the magnetic circuit 30 is withdrawn into the deformed region of Cast Strip 50 its original settling position immediately subsequently, recovered immediately once more, stablize throttling liquid stream 97 and stable, relative liquid film 114 hydrodynamics ground that are thin, that advance fast support.

In the general effect in hydromagnetic device 38, the passage (fixing elongated hole) 90 of a fixed restriction is arranged, the ANALYSIS OF COOLANT FLOW direction according to from 93 to 97 is positioned at the upstream that is right after head tank 102.And, a variable throttle orifice that provides by the variable spaces in gap 75 is be provided, the direction according to the stream of the cooling agent in the liquid film 114 of advancing fast is positioned at the and then downstream of head tank 102.Therefore, advantageously, enter the pressure change of the spacing of (almost instantaneous) response gap 75 immediately of the cooling agent stream 97 of head tank 102, thereby and allow the powerful hydrodynamics thrust that the magnetic pull balance is weakened of stretching out immediately, make the state of the Cast Strip 50 of motion reach balance.

Can notice that from Fig. 3 A and 6 throttling cooling agent stream 97 and the cooling agent film 114 (Fig. 6) of advancing fast radiate from the head tank 102 of direct and pole surface 34 adjacency, the magnetic line of force in the magnetic circuit 30 is very strong at pole surface 34 places.In this local mode, magnetic attachment pulling force that stretches out and hydrodynamics thrust keep balance in the relation of drawing/push away of the position that they are close to oneself,, only in a little lateral separation of thin Cast Strip 50 opposite thrust and pulling force balance are taking place that is.Thereby to the useful effect of Cast Strip, only relate to an inapparent arm of force for these opposite pulling force and thrust.Therefore, by means of the relative pulling force and the thrust that work with local mode, advantageously inapparent mechanically deform (opposite with thermal deformation) is incorporated in the thin Cast Strip.

The direction and the shape of the cooling agent film of advancing fast that flows through pole surface 34 that marks by liquid fluid line 114 in Fig. 3 A, have been expressed.Throttling cooling agent stream 97 (Fig. 6) and these overflow cooling agent film 114 fast Cast Strip 50 are floated, make its maintenance leave pole surface 34 certain distances, therefore solved effectively owing to the Cast Strip of motion and the problem that contacts the friction and wear that produces of sliding support or Cast Strip support member.

Simultaneously, these liquid films of advancing fast 114 are taken away heat from the reverse side of the Cast Strip (not shown Fig. 3 A) of cutting or skimmed over the slower cooling agent of any motion effectively, so that cool off the Cast Strip effectively.If do not adopt unidirectional removing liquid stream 115 (sweeping flow) (back will be described), the cooling agent film 114 of advancing fast after flowing through corresponding pole surface 34 will with the adjacent pole member in flow through pole surface 34 simultaneously the cooling agent film of advancing fast impact mutually, near and turbulent flow impact zone 113 in the middle of each slender space 66 center line, can producing, wherein, cooling agent has and is roughly zero clean unidirectional momentum, therefore, except gravitational whereabouts or outflow effect (spiu-off), will be for removing cooling agent less than effect from pole pieces 39.

For the cooling agent 113 that makes any turbulent flow turns to, redirects, merges, recovers with the cooling agent film 114 of advancing fast and removes from each slender space 66, so that be at the head tank 102 continuous cooling agents stream slot millings that flow out and to carrying out suitable cooling in the Cast Strip, removing cooling agent stream 115 rapid movement, that quantity is many, unidirectional (Fig. 3 A, 4 and 4A) is introduced into the upstream extremity in each space 66.This unidirectional removing liquid stream 115 can prevent that near the reverse side of Cast Strip any cooling agent stream is with respect to taking away slow excessively (that is, for suitable cooling Cast Strip, slow excessively to prevent the Cast Strip fire damage) for the heat from this reverse side aptly.This removing liquid stream 115 makes all cooling agents finally flow along a direction, simultaneously, all points on the reverse side of Cast Strip, the speed that keeps relative stability between cooling agent and Cast Strip is so that prevent the Cast Strip fire damage.Clearer these unidirectional removing liquid streams 115 of expressing cooling agent provide by removing nozzle 112 in Fig. 4 and Fig. 4 A, near the upstream extremity of the pipe path 92 this removing nozzle and the upstream pipe close 94 is connected, and removes nozzle so that make the cooling agent stream 93 of supercharging enter these.

Each removes the theta alignment downstream of nozzle 112 (Fig. 4 and Fig. 4 A) with a point, becomes less acute angle when arriving the reverse side of the Cast Strip of moving.Each is removed nozzle 112 and has a lid shape nail shape deflector 116, is installed in and removes near the nozzle downstream/discharge end, is used for laterally discharging swiftly flowing strong removing coolant fluid stream 115 from removing nozzle.Nail shape deflector 116 points to the Cast Strip reverse side of motion with a smaller slightly acute angle (that is less angle) of removing nozzle 112 that is connected than them.

Each nail shape deflector 116 will be on removing strong liquid stream 115 (Fig. 3 A) the guiding Cast Strip that nozzle ejection comes out near near relative even, the exactly determined zone a upstream of each elongated pole pieces 39, ship shape tip 118 (Fig. 3 with 3A the most high-visible), and described liquid stream 115 is removed nozzle from it and is impacted acute angle with one and flow to the Cast Strip reverse side.The downstream of pole pieces 39 usually also with its ship shape tip, upstream 118 the same prow shape 120 (Fig. 2 and 3) that are made into point.The hole of removing nozzle 112 has greater than throttle orifice 90 but less than the cross-sectional area of pipe path 92.Determining of the relative scale size of the cross-sectional area of removing nozzle 112 and the cross-sectional area of pipe path 92, should make under the boost pressure of the cooling agent in collector pipe 100 (Fig. 4 and 4A), cooling agent stream 97 (Fig. 6) that enter head tank 102 can be not deficient, simultaneously, removing liquid stream 115 can be not deficient yet.Therefore, remove speed, flow and the momentum of cooling agent 115, for the liquid film of taking away along downstream fusion, deflection and removing after all cooling agent turbulent flows 113 and all are overflowed from gap 75 of advancing fast 114, enough fast and amount enough greatly, simultaneously, at the relative velocity that keeps basic of having a few of the reverse side of Cast Strip, this speed is enough to guarantee to prevent the Cast Strip fire damage.

Remove the downstream of cooling agent 115 (adding) from slender space 66 with its band other cooling agent downstream flow out after soon, the water conservancy diversion bucket 122 with respect to the Cast Strip horizontal expansion of motion is ladled out away cooling agent from the Cast Strip of moving.The cooling agent that continuous ANALYSIS OF COOLANT FLOW groove (not shown) is used for scooping out turns back to a supply reservoir (not shown).Except water conservancy diversion bucket 122 does not comprise to the Cast Strip applies the collector pipe or collector pipe nozzle that cooling fluid uses again, this cooling agent water conservancy diversion bucket 122 and its ANALYSIS OF COOLANT FLOW groove, for example can be similar with the water conservancy diversion bucket among U.S. Patent No. 3,036,348 Fig. 6 and 7 of the people such as Hazelett that are shown in homepage.

Shown in Fig. 4 A, pole pieces 39 (only showing one) has a narrow upstream side-prominent nose part 39n, the outstanding zone (nip region) 110 of nipping that surpasses of this nose 39n makes this nose 39n insert in the groove 127 between two alar parts 128 on the belt wheel roller of nipping.Therefore, referring to Fig. 4 A, remove nozzle 112 and its nail shape conducting element 116 and all be positioned at the position of leaning on the upstream with respect to the zone 110 of nipping slightly.As Fig. 8, in 9 and 10 by 51n marked like that, the array with hydromagnetic device 38 of narrow nose part 39n is called as nose shape array.

Their alar part 128 of nipping belt wheel 56,60 and being schematically shown integrally with the belt wheel main body is made by nonmagnetic substance, for example diamagnetism or paramagnetic material are made, 304 type austenitic stainless steels for example, thereby the described alar part and the belt wheel of nipping can not make the leaked magnetic flux amount leave pole pieces 39,39n also enters described alar part and belt wheel, and this leakage will make from the magnetic flux that stretches out of the Cast Strip that is used for stable motion that the pole surface 34 of the nose 39n of pole pieces 39 obtains and reduce.As a kind of selection, alar part can be made by above-mentioned non-magnetic stainless steel, and the main body of belt wheel is made by the soft magnetism ferromagnetic material, is used for and the complete magnetic circuit of the common formation of the nose 39n of pole pieces.Select as another kind, described alar part 128 can be made by the soft magnet magnet, and the belt wheel main body is made by nonmagnetic substance.Then, at the casting machine duration of work, the permanent magnet that stretches out effect is configured to magnetize described alar part with the north and south poles that replaces, in order to attract and stable Cast Strip.For example shown in Figure 11 and 12, these magnets can movably be installed together with operating mechanism, move this magnet, in order to reduce the magnetic attraction between alar part and the belt wheel, so that unload the Cast Strip and other Cast Strip is installed from casting machine.As a kind of selection, can adopt for example movable shunt shown in Figure 13 and 14, be used to reduce the magnetic attraction between alar part and Cast Strip, so that carry out above-mentioned dismounting and installation.

Permanent magnet material in each permanent magnet magnetizes magnetic circuit 30 (Fig. 6) forcefully, also magnetize simultaneously whole pole pieces 39 forcefully, in order to the powerful attraction (pulling force) of stretching out to be provided on the Cast Strip 50 of the motion that contains the soft magnetism ferromagnetic material, described permanent magnet material has some very important magnetic circuit characteristic: a sample of (1) this permanent magnet material has the normal hysteresis curve (BH loop) that intersects on one point with the B-axle, wherein, this sample has the residual magnetic flux density Br that a magnetic flux density is equal to or greater than about 8,000 Gausses.(2) this permanent magnet material sample has normal hysteresis curve (BH loop), wherein, the slope that has an expression mid point differential demagnetization magnetic conductivity at the tangent straight line of mid point of second quadrant or four-quadrant and this part of loop line, if the magnetic conductivity of air is 1, then differential demagnetization magnetic conductivity Δ Gauss/Δ oersted is approximately equal to or less than 4 greatly.And this permanent magnet material need have very strong stability, that is, say roughly, and it need be difficult to demagnetization, that is, on the meaning of magnetics, " firmly " needs very big demagnetization coercivity to make this permanent magnet demagnetization.These beneficial feature of magnet 32 will further be discussed in conjunction with Fig. 7 and 15.

" the mid point differential demagnetization magnetic conductivity " of a used here permanent magnet material sample of term is meant the slope that Δ Gauss/the Δ oersted is represented with straight line, described straight line loop line be positioned at second or the BH loop of the midpoint of four-quadrant part and sample tangent.The B/H loop line that should be appreciated that sample is drawn in the curve map, wherein, B value and H value are marked scale along vertical axis and trunnion axis respectively, make the B/H or the Δ B/ Δ H of vacuum, promptly, the slope of the magnetic flux density B that produces by applying coercivity H to vacuum, when its on same curve map the time always 1; In other words, in the time of on being drawn in same curve map, to the coercivity changes delta H that vacuum applies, the rate of change of magnetic flux density Δ B always is one.In the table below, we have listed the preferred parameter about these important key characteristics.

Table I

A permanent magnet material sample in magnet 32 has one and meets at any BH loop with the B axle, at described intersection point place, residual magnetic induction B _rHave with Gauss is that the magnetic flux of unit is close The degree value:

Generally be equal to or greater than 8,000

Preferably be equal to or greater than about 9,000

More preferably be equal to or greater than about 10,000

Most preferably about more than 11,000

Table II

A permanent magnet material sample in magnet 32 has With Δ Gauss/Δ oerstedThe mid point differential demagnetization magnetic conductivity of expression:

Preferably be equal to or less than about 4

More preferably be equal to or less than 2.5

Most preferably be equal to or less than 1.2

We speak of in the introduction in front, and in our view, the very strong magnetomotive force as shown in Table I that is provided by above-mentioned permanent magnet 32 is not the unique prerequisite that is well on and operates.As shown in Table II, their very low mid point differential demagnetization magnetic conductivity also is very crucial.For example, the mid point differential of alnico alloy (alnico) 5 demagnetization magnetic conductivity is approximately 30.It is about 30/1.2 that this of aluminium nickel cobalt 5 is approximately ratio that 30 value compares with most preferred value 1.2 in the Table II, equals 25.Thereby, given length for magnets N ' best S ' utmost point, generally speaking, the destruction to the magnetic attraction that provided by alnico magnet that causes of the increment that increases of the spacing of gap 75 (Fig. 6) approximately is to the destruction of the magnetic attraction that provided by the magnet among the application 32 25 times.This Not onlyThe difference of the amount of being, ButA difference of matter! Therefore, aluminium nickel cobalt 5 magnets have been lost the control to the thermal deformation of Cast Strip 50 or 52; Be configured among array 51 or the 51n and then can not lose control described thermal deformation according to the magnet of the present invention 32 of description of preferred embodiments work.

Consider that magnet 32 plays thundering effect in its oneself magnetic circuit 30 (Fig. 6) another approach is, recognize that the magnetic line of force in the magnetic circuit 30 must pass magnet 30 from S ' to N ', described thundering effect is by extremely low, and magnetic conductivity provided in for example about 1.2 mid point demagnetization.Suppose that magnet 32 33 33 has the physical length of an inch (25.4mm) to the end from the end.Value 1.2 is compared the magnetic line of force that means in the magnet 32 self with the value 1 of air must cross over " inner apparent the air gap (the internalapparent air gap) " of 1 physics inch divided by 1.2 length, i.e. apparent the air gap, the inside of 0.83 inch (21mm).Gap 75 at the 1.5mm of pole surface 34 is compared with the 21mm of magnet itself " inner apparent the air gap ", equals 7.1%.On the contrary, the length of 1 physics inch of aluminium nickel cobalt 5 magnets is 30 mid point differential demagnetization magnetic conductivity divided by the value of its hypothesis, and having only is " the inner performance the air gap " of 0.033 inch (0.84mm).1.5mm gap 75 compare with the 0.84mm of aluminium nickel cobalt 5 magnets itself " internal air gap ", equal 178%.Seeing that once more 178% compares with 7.1%, is 25 times to the destructiveness of magnetic attracting force.Write by professional engineer Lester R.Moskowitz and 1976 and 1985 by Malabar, the Krieger Publishing Company of Florida 32950 composes and prints Permanent Magnet Design and Application HandbookIn, in his Fig. 6-3 that is called " Analysisof a magnetic hysteresis loop. (The hysteresis curve shown is typicalfor Alnico 5) ", by drawing a straight line tangent with the mid point of second quadrant, the mid point differential demagnetization magnetic conductivity of obtaining aluminium nickel cobalt 5 is approximately 30.

Shown in Fig. 4 and 4A, elongated pole pieces 39 is by a transverse beam 104 fixing and supports, and this transverse beam is made by nonmagnetic substance (paramagnetic material or antimagnetic material), for example, and the nonmagnetic austenitic stainless steel of 303 types.Pole pieces 39 is placed in the groove 106 in the beam 140.Upstream extremity in pole pieces 39 is a fixing hole 95, is used to that pole pieces is aligned and to its support of assisting.Be arranged in the sole 141 that transverse beam 108 under the beam 104 is comprised in bottom balladeur train L.This beam 108 is made by suitable structural material, for example structural steel.

In our present the understanding of the present invention, we believe, when the present invention is applied in the position, farthest, upstream of biobelt casting machine 36, promptly near the whole length of crystallizer cavity C first 1/3rd or its about when locating, be most valuable, because the thermal stress that should locate on the Cast Strip is the strongest.Described first 1/3rd position 49 begins to measure from entering the mouth, and as Fig. 8, shown in 9 and 10, a feeding nozzle 138 is introduced melt metal at inlet 49 places.This upstream farthest is that the metal that is solidifying of fragility is at first from the zone of liquid state to solid-state transformation.

At Fig. 4, array 51 among the 4A and 5 and 51n are installed on the sole of a Cast Strip balladeur train by transverse beam 104,108 rigidity.In order to cast some metal continuously, may need to adopt hydromagnetic array or the pad 51n and 51 that installs along the whole length rigidity of crystallizer cavity C.

Practice in continuous casting shows, in the Cast Strip fastening that the downstream part with crystallizer cavity C links to each other, usually the elasticity that needs appropriateness, particularly in the aluminium alloy casting process, in this case, metal does not solidify fully running through on the whole thickness of cast article P, makes it that significant deformation take place in cooling procedure but formed enough solid metals.This elasticity can make the front surface maintenance of the Cast Strip of motion hold tightly with the metal that is cooled and contact.

Be used for and need providing in the conticaster of flexible metal continuous cast operation at the Cast Strip fastening, one or more downstream arrays 51 can be installed on the disc spring, or are installed on submissive, the rubber-like horizontal support piece.In the time of can operating utilize unshowned mechanism adjust downstream array 51 in the face of or away from the position of casting cavity C with arrange and thisly be used to regulate Cast Strip submissive, the rubber-like support member and support guiding mechanism, can be similar to the United States Patent (USP) 4 of Hazelett and Wood, 552,201; 4,671,341; The mechanism that shows and illustrate in 4,658,883 and 4,674,558.

A kind ofly stablize the elasticity of hydromagnetic Cast Strip pad array 51 and method that compliance is adjusted is, adopt the throttling path 90 (the most high-visible in Fig. 6) of different-diameter.Given boost pressure can be chosen in the above scope of about 30psi, for employing be used to cast special metal or metal alloy, one or more specific motion, annular, flexibility, thin heat conduction Cast Strip, can select on request.

As shown in Figure 8, in an embodiment of the present invention, there is the Cast Strip of four hydromagnetic devices 38 to stablize array 51.In addition, also have two with bottom and top nip belt wheel roller 56 and 60 be operatively coupled on nose shape Cast Strip stablize array 51n.In these nose shape arrays 51n, the upstream of pole pieces 39 elongated nose shape part 39n (Fig. 4 A) is inserted into bottom and top respectively and nips in the groove 127 between the circumference alar part 128 on belt wheel roller 56 and 60.Be provided with cooling agent water conservancy diversion bucket 122 in the downstream of nose shape array 51n (along the direction of direction arrow 61 indications), and also be provided with such water conservancy diversion bucket near the bottom of crystallizer cavity C mid portion and the downstream of top array 51.From the cooling agent that the downstream of the downstream array 51 on bottom and top flows out, can fall from the back side of Cast Strip, bottom and overflow from the edge of Cast Strip, top.

In Fig. 8, top downstream water pad array 53 is installed on the sole 142 of Cast Strip, top balladeur train by flexible by flexible mount 140 disc spring for example.Magnet is omitted from water cushion array 53 usually.

About the embodiments of the invention shown in Fig. 9 and 10, can see that from Fig. 4 A any water conservancy diversion before the strip support rolls 126 of the band wing (executing with spilling) bucket 123 all is equipped with a collector pipe 101 along the horizontal expansion of sole.The cooling agent stream 93 that supply is pressurized in this collector pipe 101, and spill at this water conservancy diversion and cooling agent and to execute on the bucket 123, comprise and manyly coolant jet 105 is aimed at the cooling agents that point to downstreams spill the cryogen discharge nozzle 103 (in Fig. 4 A, can only see) of executing surface 107.Having a collector pipe 101, discharge nozzle 103 and spill to execute surface 107 water conservancy diversion and spill and execute bucket 123 and be well known in the art like this.Shown in Fig. 4 A, be right after cooling agent and spill that to execute 107 downstream, surface be the strip support rolls 126 of a band wing known in the art.

In embodiments of the invention shown in Figure 9, first sequence that is positioned at from first water conservancy diversion and spills the band wing strip support rolls 126 in the downstream of executing bucket 123 is all arranged in bottom and Cast Strip, top balladeur train L and U, this sequence is right after the downstream of nose shape array 51n.Then, in two balladeur trains, all have one after second sequence of strip support rolls 126 that is connected on the band wing second water conservancy diversion and spill and execute bucket 123.United States Patent (USP) 4,552,201 as Hazelett and Wood; 4,671,341; 4,658,883 and 4,674, shown in 558, the strip support rolls 126 of one or more such band wings, can towards and leave crystallizer cavity C and flexibly install, and/or be flexible and adjustable.

In embodiments of the invention shown in Figure 10, the assembling of the top balladeur train of the top balladeur train of biobelt casting machine 36 and biobelt casting machine 36 shown in Figure 9 is similar, that is, have the strip support rolls sequence of two band wings, these two sequences are positioned at water conservancy diversion separately and spill and execute after the bucket 123.In Figure 10, the bottom balladeur train has the non magnetic array 53 of two fluid dynamics devices 38, except permanent magnet 32 was omitted from non magnetic array 53, the array 51 of the hydromagnetic device 38 shown in these two arrays and Fig. 2,3,3A, 4, the 4A, 5 and 6 was similar.These arrays 53 are positioned at after the water conservancy diversion bucket 122 similar water conservancy diversion buckets 122 shown in structure and Fig. 4.

Amount according to used removing cooling agent 115, may need to adopt an integral body, flat liquid coolant nozzle or " burner again " (formula effect) nozzle 130 (Fig. 4 b, 4c), this nozzle points to the downstream from the downstream of each pole pieces 39, and is its part of the whole.This again burner (action type) nozzle 130 cover Cast Strips 50 or 52 at last head tank 102 ' and leave air deflector 107 backs from the zones between the cooling agent-Cast Strip-impact zone that spills the cooling agent 132 of executing bucket and coming.As shown in the figure, the impact zone 134 of described cooling agent 132 (also referring to Fig. 4 A) near shown in the first backing roll alar part 126 and Cast Strip 50 position contacting.Burner nozzle 130 is shown among Fig. 4 B-Fig. 4 C again, and Fig. 4 B is the amplifier section of Fig. 4 A, and Fig. 4 C is the amplifier section of Fig. 2, for more clearly expression, has left out time Cast Strip 50 in Fig. 2.Burner noz(zle) 130 has replaced the zone of the pointed fore 120 in downstream (Fig. 2,3) again.A last head tank in farthest, Fig. 4 B right side because it is different with other head tank, so be denoted as 102 ', above-mentioned be not both because of nozzle 130 be connected to nozzle 102 ' in, and by its feed fluid cooling agent.Insert head tank 102 ' throttling path 90 ' different with other throttling feeding path 90, it has remarkable bigger diameter, for example about 3/16 inch diameter.Determine each flat front of burner nozzle 130 again by the back side of Cast Strip 50 or 52.Determine another flat front by the end of burner again platform-like edge surface 133 that form, that dwindle in pole pieces 39.Nozzle 130 vertically is shown among Fig. 4 B along cross section, and is shown in Fig. 4 C with a visual angle that tilts from the top.Show out from the downstream branch removing liquid stream (Fig. 4 B and 4C) of the cooling agent of nozzle 130 outflows by arrow 130.Replace nozzle 130, can adopt any in several devices, the atomizing of liquids cooling agent for example adopts the internal path that can be arranged in the pole pieces downstream, and this path is empty at the sidepiece of pole pieces, and is often referred to downstream.Alternatively, pipeline or spray orifice and/or air deflector can be set between pole pieces in space 66, be used for dispense liquid cooling agent downstream.

As shown in figure 11, a magnet rotating member 145 can be set reducing the powerful attraction of stretching out of magnetic circuit 30 on Cast Strip 50, so that can the thin flexible Cast Strip of installation or removal and it is not caused damage.This device 145 has one and is installed in that bearing 148 (Figure 12) is gone up and along the elongated cylinder rotor 147 of the longitudinal extension of Cast Strip balladeur train, and pole pieces 39 is parallel-oriented and between pole pieces.Cylindrical rotor 147 has one by two magnetic soft ferromagnetic stainless steels of double, for example the housing 146 of the axially open made of 430 type stainless steels.This rotor comprises a plurality of magnets 32 (Figure 12), and interior flux path the S '-N ' of these magnets 32 is parallel-oriented with the diametral plane 149 that passes rotor 147 rotating shafts 151.The housing 146 of rotor has the sidepiece 155 of flattening, and this sidepiece 155 is parallel with diametral plane 149, in order to form arctic N ' and South Pole S ' effectively on rotor case.Adjacent rotor 147 is equipped with the soft magnet magnet material, for example the stainless intermediate axle fitting 154 of 430 types.These bridgewares 154 have in the face of cylindrical rotor 147 and press close to it with keeping at a certain distance away cylindrical recessed surperficial 153.

Among Figure 11 and 12, shown in rotor 147 be positioned on the position of its " pass ", on this position, magnetic circuit usually and 30 places shown in Fig. 6 similar, disconnected effectively, so that the magnetic flux that the magnet from Figure 11 32 comes out departs from out from pole surface 34.The magnetic flux that departs from gets around the path from N ' to S ' substantially by passing from the magnetic bridgeware 154 parallel with the direction cardinal principle of root diameter face 149.On this off-position, the flattening side 155 of diametral plane 149 and rotor is parallel-oriented with the side surface of pole pieces 39.Therefore, the magnetic flux of arrival pole surface 34 significantly reduces.Thereby, the attraction of Cast Strip 50 is reduced greatly, so that it is mounted and dismounted and it is not caused damage.Upper and lower support member 156 and 158 is non magnetic, is for example made by 303 type austenitic stainless steels.

For " connection " magnet whirligig 145, with its rotor 147 around axle 151 half-twists, so that its diametral plane 149 is directly aimed at recessed surperficial 153 central area of bridgeware 154.Therefore, the arctic N ' of magnet is connected with the extremely tight earth magnetism of S ' by the corresponding N ' utmost point that is positioned on its housing with South Pole S ', in order to closely to connect these bridgewares 154, so that form intactly magnetic circuit in array shown in Figure 11.This " leading to " magnetic circuit among Figure 11 can be envisioned for from magnet arctic N ' and pass rotor case 34,146 a N ' utmost point, one first bridgeware 154, one first pole pieces 39 to 1 first pole surface 34, and through one first gap 75, enter Cast Strip 50, in the Cast Strip, extend to and through one second gap 75 and enter one second pole surface 34, pass one second pole pieces 39 and arrive second bridgeware 154, and pass the S ' utmost point of rotor case 146, arrive a magnet South Pole S ',, form complete magnetic circuit with each magnetic circuit of magnet inside from S ' utmost point to N ' utmost point.

For rotor 147 half-twists being arrived its " leading to " position, its housing 146 is provided with pivot 152 (Figure 12), the axle journal of pivot 152 is supported in and is installed on support member 156, in the bearing 148 on 158, this housing 146 also has one and is fixed to the link arm (clevisarm) 162 that also is connected at 161 places pivotly on the pivot on the piston rod 163, and piston rod 163 is connected on the piston 165 in the hydraulic cylinder 160.A back-moving spring 166 is pressed in piston on the off-position that makes magnet whirligig 145.In " leading to " position of Figure 11 rotor link arm 162 by empty outline line 162 ' mark.Hydraulic cylinder 160 has piston chamber 167, and piston chamber 167 is connected on the cooling agent supply pipe 98 by a flexible pipe 164.Therefore, when the cooling agent by collector pipe 100 supply superchargings, cooling agent enters piston chamber 167, and the biasing force of resistance spring 166 lifts piston 165, so that the position that turns to it " to lead to " rotor 147.In case coolant pressure is switched off, spring 166 will be got back to the off-position of magnet whirligig 145.

Replace adopting independently hydraulic cylinder 160, in order to operate each rotor 147, all magnet whirligig 145 link arms 162 in the array 51 can be pivotally connected on the shared actuator lever, this actuator lever is extended array 51 and manual or hydraulic operation, is used for simultaneously all rotors 147 being turned to their " leading to " or off-position.

Figure 13 and 14 is represented an alternative mechanism that is used for magnetic circuit is turned to " leading to " or off-position, and this mechanism adopts a soft magnet magnet material, for example the stainless vertically movable bypass bar (shuntbar) 170 of 430 types.This bypass bar 170 slidably with pole pieces 39 adjacency, can slide into its " leading to " position in Figure 14 from its off-position among Figure 13.This bypass bar is made into the groove profile of tooth, so that a plurality of platform shape projectioies 172 with interval trough 174 are provided.These high platforms are along bar 170 longitudinal separations, and its mid point to the spacing of mid point equals the twice of the mid point of pole pieces 39 to middle dot spacing " d ".These high platforms 172 and their interval trough 174 extend the approximately distance identical with " d " along the bypass bar.Therefore, as shown in figure 13, locate in the off-position, each high platform 172 directly with two mutually diamagnetic pole pieces 39 adjacency, promptly directly engage with two mutually diamagnetic pole pieces 39, therefore, direct from center that the center bridge of N pole pieces 39 is received the S pole pieces of facing mutually, so that the shunting magnetic line of force makes it to depart from pole surface 34.On the contrary, on " leading to " position, all platforms 172 directly with pole pieces 39 adjacency (joint) of identical polar (for example N), and interval trough 174 is all towards the pole pieces of identical polar (for example S), and spaced apart with these pole pieces, the pole pieces polarity that described polarity is connected with Tong Gaotai is opposite.Therefore, only produce minimum shunting, and by the whole magnetic circuit 30 (Fig. 6) of finishing noted earlier.

Shown in embodiments of the invention in, elongated pole pieces 39 is along installing from the upstream to the orientation in downstream, because the orientation in this upstream longitudinally to downstream is very suitable to the biobelt conticaster.It appears to us that, may there be such motion Cast Strip conticaster structure, in this structure, for the nozzle 90 that comprises many particular design, 102 and remove nozzle 112, the 116 horizontal installations in interior elongated pole pieces are very easily, so that cooling agent stream 115 is laterally advanced the reverse side of the Cast Strip of passing motion.

Simultaneously, we notice that described elongated pole pieces 39 vertically is shaped makes the longitudinally curved shape of its pole surface 34 so that for example be suitable for special circumstances in a single band conticaster, wherein, the circular arc of the bigger broad warp of radius is followed in the path of single Cast Strip usually.In a kind of like this casting machine of the casting chamber with buckling, pole surface 34 will longitudinally bend to a circular arc of broad warp corresponding to the mild circular arc of motion Cast Strip, so as with the Cast Strip magnetohydrodynamics of motion be stabilized on its required accurate path.The pole surface of this buckling can be considered to the array of coplane, because they are stabilized in a straight state with the Cast Strip of moving.

In addition, one or a pair of Cast Strip along in the conticaster of route movement of straight line, pole surface 34 is being straight on the longitudinal direction of casting path, but the pole surface array can be the horizontal direction broad warp along the path, makes it make laterally broad warp of Cast Strip when casting path moves.The pole surface array of this transverse curvature can be considered to coplane, and the Cast Strip is stabilized in a straightened condition because they will move.

The effect of these embodiment of the present invention is, the Cast Strip of motion is compelled to remain on straightened condition, and be limited in the scope of a very narrow glacing flatness (flatness), also be limited at simultaneously in the very narrow scope of clearance (gap 75) distance apart from the pole surface 34 of the hydrodynamics supported array 51 of hydromagnetic device 38 or 51n.

Any permanent magnet 32 that our expection is made by the permanent magnetism magnetic material with very important key characteristic recited above all can successfully be realized disclosed these embodiment of the present invention.We like adopting contains the commercial magnet 32 that is referred to as the permanent-magnet material of rareearth magnetic material, the magnet that the magnetic material of for example at least a by comprising " rare earth " chemical element (sequence number is 57 to 71 lanthanum family chemical element) constitutes for example preferably contains the magnet of the permanent-magnet material of rare earth chemistry element neodymium or samarium.For example, can adopt maximum magnetic energy product be about 20MGOe (megagauss-oersted) by the compound (Co that contains cobalt and samarium ₅Sm) magnet that permanent-magnet material constitutes is because the residual magnetic flux density B that its B-H hysteresis curve has about 9,000 Gausses _r, also can adopt and contain maximum magnetic energy product at about Co of 22 to 28MGOe ₁₇Sm ₂The magnet of material is because its BH loop has about 9,000 to 11,000 Gausses' the interior residual magnetic flux density B of scope _r

Maximum magnetic energy product is about the Co of 20MGOe ₅The Sm permanent-magnet material has and is about 1.08 mid point differential demagnetization magnetic conductivity.Maximum magnetic energy product is at 22 Co that arrive in the 28MGOe scope ₁₇Sm ₂Permanent-magnet material has the mid point differential demagnetization magnetic conductivity in from 1.15 to 1.0 scopes approximately.

Our highly preferred permanent magnet 32 contains three elements (ternary) compound with iron, neodymium and boron, and common name neodymium iron boron, Nd-Fe-B or NdFeB be basic permanent-magnet material, the maximum magnetic energy product scope of neodymium iron boron approximately from 25 to 35MGOe.This magnet can be described as " neodymium (neo) magnet ", and it is highly preferred having approximately from 32 to 35MGOe neodymium (neo) magnet at present.Maximum magnetic energy product has a residual magnetic flux density Br at the BH loop of about 10,700 Gausses to about 12,300 scopes at about 25 to 35MGOe NdFeB permanent magnet material, and has about 1.15 mid point differential demagnetization magnetic conductivity.The corrosion resistance of neodymium (Neo) magnet is very low, so they are nickel plating.

We expect, in other permanent-magnet material in future, for example three component composition permanent-magnet materials of iron-samarium-nitride and other the unknown and unknown quaternary element (quaternary) permanent-magnet material, might become the commercially available prod, the BH loop that might have sufficiently high residual magnetic flux density Br as shown in Table I, also have simultaneously enough low mid point differential demagnetization magnetic conductivity as shown in Table II, be applicable to embodiments of the invention.

Figure 15 represents that maximum magnetic energy product is about the approximate general BH loop 200 of the NdFeB permanent-magnet material of 35MGOe.B axle and H axle intersect at initial point 216.This " neodymium neo magnet " material generally demonstrates the saturation magnetization that is about from 20,000 to 25,000 Gausses at 202 places as shown in the figure.This BH curve 200 intersects with positive B axle at point 204 places, and its remanence density Br is from 12,000 to 12,300 Gausses approximately.The part of loop line 200 in the second quadrant ii (demagnetization quadrant) very is essentially a straight line 206 valuably, and it tilts to drop to point 208 places of horizontal H axle, and its value is about-11,000 oersteds.The negative sign that is used for oersted at the left of B axle represents the action direction of coercivity H and produce initial magnetically saturated original coercitive action direction at 202 places opposite.The characteristic that circle 210 is illustrated in 206 parts of loop line 200 among the second quadrant ii of demagnetization is our present institute interesting areas.Mark in mid point 212 places of the demagnetization part 206 that is essentially a straight line of curve 200 about 7,000 Gauss's flux density value multiply by marked about 5, the product of the coercivity value of 000 oersted provides maximum magnetic energy product and is about 35,000,000 Gauss's oersted, that is about 35 mega gaussorersteds (about 35MGOe).

Determine mid point differential demagnetization magnetic conductivity at mid point 212 places, it is at the tangent slope of mid point 212 place's straight lines to BH loop 206 parts, is about 1.15.In general, this permanent magnetism " neodymium neo magnet " material has (1) and is about 12,000 to about 12,300 Gausses' residual magnetic flux density B _r, and have (2) and be about 1.15 average differential demagnetization magnetic conductivity, thereby a described powerful and useful attraction of stretching out can be provided.

Also express the approximate general BH loop 220 of aluminium nickel cobalt 5 with saturation magnetization at Figure 15.This hysteresis curve of aluminium nickel cobalt 5 and B axle intersect at residual magnetic flux density Br and are about 12,800 Gauss places, the residual magnetic flux density B that among Fig. 6 of the handbook of Lester R.Moskowitz as mentioned above-3 magnetic hysteresis of aluminium nickel cobalt 5 is returned _rLine is measured like that.But aluminium nickel cobalt 5 curves 220 have a saturation magnetization that is not more than about 15,000 Gausses.The demagnetizing curve 222 of aluminium nickel cobalt 5 almost is vertically to descend in the second quadrant ii, intersects at 226 with the H axle, locates less than 1,000 oersted at this.Thereby the maximum magnetic energy product of aluminium nickel cobalt 5 is not more than about 7MGOe.Except that magnetic energy product was smaller, the demagnetizing curve 22 precipitous declines of aluminium nickel cobalt 5 show that the mid point differential demagnetization magnetic conductivity at mid point 224 places is about 30, and were as explained above such, this means that aluminium nickel cobalt 5 is not suitable for the magnet of embodiments of the invention.

In Fig. 7 and 7A, provided a straight line 230, it has been represented basically and has adopted when having optkmal characteristics for example maximum magnetic energy product is the magnet of permanent-magnet material " neodymium neo magnet " of 35MGOe, and the pole surface 34 of drawing as the function of the clearance distance 75 that increases attracts the Cast Strip for example reduction gradually of stretching out attraction (pulling force) of Cast Strip 50 of a motion.Increase clearance distance 75 and cause the increase of the coercitive equivalence of demagnetization that permanent magnet 32 stood, thereby attraction descends along a straight line 230 roughly, this straight line has the characteristic of the straight line portion 206 that is similar to BH loop 200 among Figure 15.

With inch and millimeter is that the clearance distance 75 of unit is shown in transverse axis, acts on average pulling force on the Cast Strip (for the magnet attraction for negative) and average thrust (for the repulsive force of cooling agent for just) and is shown in the longitudinal axis.With p.s.i. (pound/inch ²) for the average pulling force and the average thrust that act on the motion Cast Strip of unit is to be difficult to measure, therefore these numerical value along the longitudinal axis only are approximations; But their relative value generally is approximated to direct ratio, and the most significant then is their relative value.

Give the curve 240 of the rapid decline of drawing as the function of clearance distance 75 in Fig. 7 and 7A simultaneously, it has been represented basically by cooling agent stream 97 (Fig. 6) of head tank 102 ejection with by this head tank and has radiated and the hydrodynamics repulsive force (to the thrust of Cast Strip) of the rapid decline of the cooling agent film of advancing fast by gap 75.Suppose a cooling agent that suitably pumps into is offered collector pipe 100, the thickness that the diameter that increases throttle orifice 90 then is used to increase liquid stream 97 (Fig. 6) and increases film 114, thereby can increase clearance distance 75 and make curve 240 also make curve 240 become not too precipitous to the right-hand mobile while slightly, this effect can think that the effect of the feasible cooling agent pad that repels has bigger " elasticity " slightly.

Fig. 7 and 7A generally by 242 pointed conditions under, produce the state that makes mobile Cast Strip balance and stability, intersect at two curves 230 in 242 places and 240.This curved intersection point 242 is a kind of like this states, under this state, the thermal expansion Cast Strip deformation force (below will regard it as if one " inherent Cast Strip pressure ") that does not have change at random, for example when the reverse side of Cast Strip is cooled under the influence of the thermometal in crystallizer cavity C, the expansive force that the thermal conductance that produces in the Cast Strip causes.

Although at reference Fig. 7, " when describing the dynamics of Cast Strip, " power " speech seems more natural than " pressure " speech, and we find that thermodynamics produces the effect that is similar to pressure that acts in the regional area of Cast Strip for 7A, 7A ' and 7A.The effect that is similar to pressure of this inherent thermal distortion forces has the implication of " pressure " speech in the following discussion, but is not to be in the big pressure that is added to the cooling agent on the Cast Strip under the balance and stability state by head tank 102 when the Cast Strip.Have always in the process of continuous casting of metals fast that the unsettled while of drift also is the interior at Cast Strip pressure of non-quantitative, can be easily in the middle of the imagination represent with being shown in Fig. 7 A ' and 7 " at random continuously rapidly vertical drift horizontal line 260 ' with 26 " respectively.Fig. 7 A ' is illustrated in the momentary status by the intrinsic pressure of the Cast Strip of the represented median size (pressure that is about 3p.s.i.) of the datum line of a horizontal line 260 ' depict.Fig. 7 A " shows by horizontal line 260 " momentary status of the higher inherent Cast Strip pressure of being described (approximating the pressure of 5.5p.s.i.).

Make it stable and accurately suspend in order to determine whether a combination of giving stable condition can float the Cast Strip, need to draw all power, be added to the pressure of the Cast Strip of the pressure of cooling agent of the reality on the Cast Strip and the inherence that involved.In Fig. 7 and Fig. 7 A, only provided the pressure of cooling agent and do not drawn out at random interior at Cast Strip pressure.But in operating process, shown in Fig. 7 A ', generally always there are two repulsive forces: be not only the pressure that (i) has cooling agent stream and cooling agent film 114 (each curve 240 among Fig. 7 and the 7A) to be produced, and the extra pressure that produced of the inherent at random Cast Strip of the transient state pressure that also has (ii) by 260 ' described, it is about 3p.s.i. in Fig. 7 A '.New curve 240 of these two curves 240 and 260 ' addition formation in Fig. 7 A ' ', this new curve 240 ' be the total repulsion pressure (thrust) that is used to revolt magnetic force (suction pressure) curve 230.We can be this synthetic curve 240 ' be imagined as continuously, mixed and disorderly and upper and lower randomly variation, shown in arrow 241.Magnetic attachment curve 230 that in Fig. 7 A ', is stretching out and synthetic thrust curve 240 ' between the right side unknown place skew of the point 242 that can in Fig. 7 A, be drawn slightly of the new crosspoint 242 ' that produces, and the mangneto traction pressure of the magnet 32 that stretches out only is lowered a very little percentage, and therefore the magnetic attraction that stretches out still keeps forcing securely to control a Cast Strip that is stabilized.

By contrast, when considering aluminium nickel cobalt 5 magnetization curve 250, can see, this curve 250 and synthetic thrust curve 240 ' between then the position from Fig. 7 A 252 is mobile far away to the right in the equilibrium,transient crosspoint, move on to crosspoint 252 ' locate.Therefore the magnetic pressure by curve 250 representatives of aluminium nickel cobalt 5 then descends about 33%.Inherent Cast Strip pressure 260 at random ' (Fig. 7 A ') and 260 " (Fig. 7 A ") change rapidly and constantly the balance crosspoint is moved on to a new position.

When the inherent at random Cast Strip of the transient state pressure of supposition increases, during the 5.5p.s.i. that equals to be described, become very important for magnetization curve 250 situations as Fig. 7 A " horizontal line 260 ", and for stretching out magnetization curve 230 problems and not serious." expression only has a very little additional movements to the right, and wherein, the pulling force that stretches out is further reduced an extra very little percentage slightly to be plotted in the magnetic balanced crosspoint 242 of stretching out on the curve 230.But, the uncertain crosspoint 252 on aluminium nickel cobalt 5 curves 250 for aluminium nickel cobalt 5 magnets ", then show mangneto tractive force nearly descended transient state at random at Cast Strip pressure 260 " before taking place less than half.Gap 75 has been increased about 0.10 substantially to 0.12mm.In addition, equilbrium position 252 " no longer is a definite crosspoint but an indeterminable zone; " be not to resemble crossing with a definite wide-angle of stretching out that magnetization curve 230 guaranteed but very sharp acute angle (at almost parallel curve 250 and 240 " between) crosses, this makes that the equilbrium position is not really definite comparatively speaking because two curves 250 and 240." with 250 almost is to converge with parallel relation, thereby may carry out reliable compulsory stable position to the Cast Strip hardly in particular cases this, for a sizable distance, curve 240.If attempt to adopt aluminium nickel cobalt 5 magnets, then any apparently higher than being drawn on curve 260 " unsettled at random inherent Cast Strip pressure all will unconditionally overcome by the represented magnetic force of the curve 250 of aluminium nickel cobalt 5, and make the Cast Strip break away from the control of pole pieces 39.

Very different behavior between magnetic attraction curve 230 that stretches out among this Fig. 7 of being shown in and the 7A and the aluminium nickel cobalt 5 tractive force curves 250, be owing to stretch out attraction (tractive force) curve 230 and crossing of hydrodynamics cooling agent (thrust) curve 240 and more approach vertical, rather than parallel.On the other hand, aluminium nickel cobalt 5 attraction curves 250 more approach parallel rather than vertical with crossing of hydrodynamics cooling agent (thrust) curve.Thereby when handling at random unsettled power with aluminium nickel cobalt 5 magnets, the thermal deformation displacement of a part that causes clearance distance to be so small to have only the motion Cast Strip of 0.2mm just causes the stability control that loses the motion Cast Strip probably.On the contrary, even in Fig. 7 when clearance distance arrives 1.5mm (about 0.06 inch) greatly, most preferred attraction of stretching out (tractive force) by curve 230 expression is declined by less than 50%, therefore stretching out tractive force and can not lose enforceable stable control probably by curve 230 expressions.

In one embodiment of the invention, another structure of hydromagnetic device 38A makes the groove 127 between the wing 128 rotatable permanent magnet 32 can be placed each nip belt wheel 60 and 56.Therefore stretch out magnet 32 and always be positioned at the upstream of the regional line 110 of nipping together with their relevant improved elongated pole pieces 39A.Therefore, this magnet 32 provides the coplane array 51 of the pole surface 34 of the parallel district's line 110 of nipping that extends in whole upstream in space in the location of upstream together with their improved pole pieces 39A.Thereby, can obtain the magnetic attraction that fully stretches out that the coplane array by the parallel pole surface 34 of each interval sends, be used for the iron class Cast Strip 50 and 52 of upstream of the inlet 49 (Fig. 1) of the stable crystallizer cavity C that enters motion near motlten metal 37.This upstream near the motion crystallizer cavity of the regional line 110 of nipping comprises the initial condensation district on the top layer, frozen metal of contiguous two rotation Cast Strips 52 and 50, and this district is very crucial (Fig. 1) in the continuous casting of high-quality metal product.

Mainly with reference to Figure 16, the shown magnet 32 that stretches out is between the wing 128 of belt wheel 60 is nipped in the upstream.Provided the upstream extremity 118 of the pole surface 34 of the improved elongated pole pieces 39A that is positioned at regional line 110 places of nipping among the figure.This line 110 is to leave when Cast Strip 52 to nip the belt wheel wing 128 and become plane downstream (straight) along the casting chamber C that moves when advancing, the tangent position of this Cast Strip 52.

In the embodiment shown in Figure 11 and 12, rotatable magnet 32 aligns with the belt wheel wing 128 in the downstream upstream not extend and is inserted between these wings.In the structure shown in Figure 16 to 19, all parts of the pole pieces 39A of each remodeling (magnet that comprises them) all are formed in the width range interior (Figure 17) of a pulley groove 127.Among this embodiment shown in Figure 16 to 19, about one inch of the proportional spacing of the center to center of the wing 128 (about 25 millimeters), the thickness of the wing is about 1/8 inch (about 3.2mm), about 7/8 inch of its groove width (about 22mm).Therefore, all parts of the pole pieces 39A of remodeling all are made enough narrow, are limited in the width range less than 7/8 inch (less than about 22mm).Thereby the elongated pole pieces 39A of these remodeling is set at the center to center parallel distance place of about 1 inch (25mm) that traverse hydromagnetic pad array 51.

The shown belt wheel 60 of nipping has a firm core body, has the wing of being made by this core body machining integral body, as Figure 16, and 17 and 19 clearly represent such.This belt wheel 60 of nipping is made by non-magnetic stainless steel together with its wing 128,316 swaged forging system stainless steels for example, it is a kind of nonmagnetic substance, it in fact for magnetic environment without any effect.

Now equally with reference to Figure 17, and observe downstream, can see that rotatable magnet 32 is between the belt wheel wing 128.In Figure 17 (simultaneously also at Figure 16,18 and 19), represented magnet 32 rotates to the position (stretching out the position that attracts the Cast Strip) of their magnetization Cast Strips.The row of the magnet 32 that alternately extends from upstream to downstream in array 51 is assembled into their the magnet whirligig 145A in separately the pole pieces 39A, makes them have identical polarity orientation, and for example its arctic N (N ') is at the top; The staggered rows of rotatable magnet 32 then is assembled among their the magnet whirligig 145A in separately the pole pieces 39A and makes them have opposite magnetic pole orientation, and its South Pole (S ') is at the top.Locational magnetic pole shown in being positioned at by these applies the attraction of stretching out to the Cast Strip 52 of rotating, and the pole surface 34 that then is arranged in the elongated pole pieces 39A of the hydromagnetic device 38A in succession that crosses hydromagnetic pad array 51 each intervals has interlaced north (N) and southern (S) utmost point in the face of the Cast Strip 52 of rotating.

Magnetic force " line " 30 is crossed near the air gap 129 of the belt wheel wing 128 and leap (passing) belt wheel wing 128 own, and the belt wheel wing is non magnetic.An amount of leakage magnetic flux 30 ' be inevitable.Yet, thereby a large amount of required magnetic flux 30 that stretches out passes pole surface 34 and extends through 52 Cast Strips, Cast Strip and stretched out the hydromagnetic coplane pad array 51 of attraction to magnetic pole 34 consumingly.

The cooling agent 93 that pumps under the described in front pressure is provided by the collector pipe (not shown), for example the collector pipe 100 shown in Fig. 4 and Fig. 4 A.The cooling agent 93 of this supercharging is through supply pipe 98 and through 96 feedings of diagonal passage, imports the intermediate conduit path 92A (Figure 16,17 and 19) of directed upstream and from entering the pipe path 92 (Figure 16-19) of pointing to the downstream here.These paths can be counted as the supercharging passage in the passage 90 that cooling agent with supercharging is fed into fixed restriction.Cooling agent 97 by the expenditure and pressure of passage 90 ejection enters head tank 102, and the cooling agent film 114 of rapid movement (Figure 17 and 18) is gone out by head tank 102 and by the narrow gap 75 between pole surface 34 and the Cast Strip 52.Thereby between magnetic force and this fluid dynamic educational level, reach balance, cause the iron class Cast Strip 52 of moving stably to suspend near the coplane array (straight array) 51 of pole surface 34, as the front to other embodiments of the invention described.

The fixed access 92 that should be noted that Fig. 4 and Fig. 4 A has the part of a updrift side and the part of a downstream direction, but their long parts are at upstream side.On the contrary, as shown in figure 16, be that intermediate conduit path 92A is with cooling agent 93 guiding upstreams enough big distance after the district's line 110 of nipping.Then, these intermediate conduit paths 92A is communicated with pipe path 92 in the position of range line 110 upstream enough far away, makes cooling agent 93 flow to the downstream along this effective length of pipe path 92. Path 92A and 92 end are by connector 94 sealings.

The tail end that is arranged near the removing nozzle 112 (seeing at Figure 16) pole surface 34 front ends 118 and is arranged in hydromagnetic pad array 51 downstreams 120 is removed nozzle 120 (only seeing at Figure 16) (" burner nozzle again ") provides removing cooling agent 115 and 135 respectively, they point to the reverse side of Cast Strip 52 with acute angle, be used for advantageously making cooling agent film 114 (Figure 17 and the 18) deflection downstream of also passing through the gap 75 between pole surface 34 and the Cast Strip reverse side from head tank 102 ejections, and it is advanced downstream.

As can be seen, from the embodiments of the invention shown in Fig. 2 to Fig. 6 and Figure 11 to 14, has the magnet 32 between elongated pole pieces 39.In addition, in order to apply (reach-out) attraction of stretching out to the Cast Strip, the path and the Cast Strip plane parallel orientation and vertical of north, inside (N ')-Nan (S ') magnetic line of force of the magnet of each fixed position in Fig. 2 to 6 and Figure 13 and 14 with the side surface of these pole pieces 39.Magnetic rotation device 145 among Figure 11 and 12 is also between pole pieces 39.Be in the position of " pass " at this magnetic rotation device 145 shown in Figure 11, wherein, the path of the north, inside (N ') of its magnet 32 and rotor 147-Nan (S ') magnetic line of force is vertical orientated with the plane, Cast Strip and parallel with the side surface of pole pieces 39.When the control arm 162 of this rotatable device 145 forwarded the position 162 ' (Figure 11) of " leading to " to, then the north, inside (N ') of magnet 32 and rotor 147 thereof-Nan (S ') magnetic line of force path became and Cast Strip plane parallel orientation and vertical pole member 39.

In Figure 11, has the bridgeware 154 that soft magnetism demagnetization material is made, this bridgeware has elongated cylindrical concave surface 153, the elongated cylindrical rotor 147 of these concave surface facing and close magnetic rotation device 145 is used for transmitting the magnetic line of force between the rotor that is in " leading to " position and two adjacent pole pieces 39.

In the embodiment shown in Figure 16 to 19, the magnetic rotation device 145A of remodeling (only expressing) is positioned at the elongated pole pieces 39A that they are retrofited separately.For the purpose of emphasizing, repeat here to point out: the magnetic rotation device 145A (Figure 16-19) of each remodeling is positioned at the pole pieces of each remodeling Within, (Figure 11 and 12) is completely different with magnetic rotation device 145, and the latter is positioned at two adjacent pole pieces 39 Between

In elongated pole pieces 39A with each each remodeling of this magnetic rotation device 145A income, each this pole pieces is made first and second portion 39A-1 and 39A-2, every part wherein has an elongated cylinder concave surface 153 (Figure 17 and 18), this concave surface facing and near the elongated cylindrical rotor 147 of magnetic rotation device 145A.

The described first pole pieces part 39A-1 is near Cast Strip 52 or 50 and be configured to comprise pipe path 92, throttling path 90, and head tank 102, pole surface 34 is removed nozzle 112 and 120, and is comprised described other parts as Figure 16-19.

The second pole pieces part 39A-2 comprises diagonal path 96 away from Cast Strip 52 or 50, and via intermedia 92A also comprises other parts shown in Figure 16-19.This second portion 39A-2 also comprises a frame section 176 (Figure 18) of array 51.This framework 176 shown in Figure 180 a plurality of second pole pieces 39A-2 that laterally cross over and be rigidly connected.Shown framework 176 comprises a plurality of elongated cylindrical curvilinear surface 153, and these surfaces are near each rotor 147 among each remodeling pole pieces 39A but with interval.Described framework 176 can process on demand make it across and be connected on many distances pole pieces part 39A-2 far away.If desired, it can be decided according to manufacturing process across the whole width of Cast Strip.Perhaps, also can be made into a plurality of narrower frameworks 176, they are disposed side by side so that laterally cross over the whole width of Cast Strip.

(perhaps be fixed on the narrower framework 176 of a plurality of configurations arranged side by side) for whole array 51 being assembled and is supported in the casting machine, a crossbeam 180 (Figure 16 and 19) being fixed on the framework 176.

Shown in diagonal dashed lines 178 in Figure 16 and 19, fluting on framework 176 provides the clearance of being represented by Figure 17 intermediate gap 129 for the belt wheel wing 128 of nipping.The groove of opening in 178 places provides a plurality of slits, and the width of each slit equals the width that two the air gaps 129 (Figure 17) add a wing 128, thereby and form a plurality of upstream extend away from pole pieces part 39A-2 (Figure 16,17 and 19).For the core body to the belt wheel 60 of nipping provides clearance, each away from the surface of pole pieces part 39A-2 be carried out the diagonal angle processing of tilting at 180 places.

For close pole pieces part 39A-1 is fixed on the framework 176, the shoulder 182 of longitudinal extension is set in their both sides of member 39A-1.Be close to two nonmagnetic anchorage bars of for example making 184 by non-magnetic stainless steel near the longitudinal extension on the shoulder 182 of pole pieces 39A-1, non magnetic mechanical bolt 186 by means of in the patchhole 187 that screws on the framework 176 is installed on the framework 176.The width of anchorage bar 184 is suitable for close pole parts 39A-1 space and positions abreast.Simultaneously, the length dimension of mechanical bolt 186 makes that the end of mechanical bolt will be close to the end of jack 187 when the cylindrical surface 153 suitable area certain distances near pole parts 39A-1 abut against the rotor of each magnetic rotating device 15A.

Note Figure 16 once more, can see that the nose 39n-1 of close pole parts 39A-1 protrudes upward the top of the cylindrical surface 153 of this close pole parts.This nose 39n-1 nose 39n-2 place lean against away from pole parts 39A-2 on, and comprise a connecting path 92-1 that via intermedia 92A is communicated with pipe path 92.Simultaneously, this nose 39n-1 assists by a mechanical bolt 188 will be away from being fixed together with close pole parts 39A-2 and 39A-1, and this mechanical bolt 188 is by away from the nose 39n-2 of pole parts 39A-2 and screw in the jack 189 of the first nose 39n-1.

Structure and the action of the magnet whirligig 145A (only expressing one among the figure) of remodeling now will be described.Magnet 32 is assembled in a plurality of bands 177 (Figure 16 and 19) in each rotor 147 of magnet whirligig 145A.For example Figure 16 represents that one has three magnet band 177-1,177-2, the rotor of 177-3.Each comprises three magnets two magnet band 177-2 that axially align and 177-3.Rotor shown in the figure has the 3rd upstream side band 177-1 farthest, and it contains four magnets.This last band 177-1 upstream side extends to the regional line 110 of nipping.

Shown magnet 32 (Figure 17 and 18) is processed to have the shape of a pair of flat sides, and has the keyway 190 of pair of parallel, and such keyway is arranged on each side.These keyways are along the direction longitudinal extension of elongated cylindrical rotor 147, that is, the rotating shaft of they and rotor extends abreast.At each band 177-1, the magnet among 177-2 and the 177-3 is fastened on the trough-shaped housing elongate side assembly parts 146 that are formed at magnet that are made of nonmagnetic substance of pair of parallel.The inner surface of these side assembly parts 146 and the side of the magnet in the band match.Each assembly parts has a radially inwardly protruded elongate rib (key) and coincide with the keyway 190 of magnet in the band.

To the periphery of the periphery of side assembly parts 146 and magnetic pole N ' and S ' form in case for be close to close and away from pole parts 39A-1 and the rotor of the shaped form periphery 153 of 39A-2 constitute a cylindrical outer surface.

Shown in right side in Figure 17 and 18, the end of side assembly parts 146 is installed to by construction bolt 191 among half and half one of end fittings 192.As Figure 19 clearly represented, the end fittings of intermediate strap 177-2 had the jack 193 that is connected with the axle of rotor 147.Axle journal 194 protrudes vertically from the end fittings of upstream and downstream band 177-1 and 177-3, and their end is assembled in the jack 193 and is fixed in these jacks with pin 195.These axle journals 194 are supported by sleeve pipe 195 and are rotatable on this sleeve pipe, and this sleeve pipe is fastening by shell 196.

End, upstream axle journal 194 on the upstream-side-end assembly parts of the first band 177-1 is installed in one by in the fixing sleeve pipe of shell 197 supporting, this shell then by a mechanical bolt 198 be fixed on away from pole parts 39A-2 on.A downstream journal shaft is passed sleeve pipe 196 to protrusion, this sleeve pipe by a construction bolt 198 be fixed to away from pole parts 39A-2 on a carriage 199 on.

For iron class Cast Strip 52 can be removed and be replaced, each magnetic rotation device 145A is forwarded to the position of " breaking " from the position of " the leading to " shown in Figure 16-19 around the axle of its rotor 147, magnetic pole N ' is in the direction parallel with the Cast Strip with S ' in this position, that is, thus the magnetic pole S ' of the magnetic pole N ' of identical polar and N ' and identical polar and S ' become and change into the attraction of the centre that greatly reduces pole surface 34 and Cast Strip 52 toward each other.An actuation lever arm 162 (Figure 16) is fastened on the axial raised downstream axle journal 194 of each magnetic rotation device 145A in the array 51.In whole array, a public control stick 201 is connected to the end of each actuation lever arm 162 by pivot connector 203.Thereby all bands in whole array 51 can rotate to their " the leading to " or the position of " breaking " simultaneously by moving public control stick 201.

Though disclose specific embodiments more of the present invention here in detail, should be appreciated that these examples of the present invention are for illustrative purposes.This openly can not be counted as limitation of the present invention, because be familiar with the personnel in continuous casting field can be in the scope that does not exceed following claim to the change or use the permanent-magnet material of equivalence instead in detail of described method and apparatus, so that make these equipment and method in casting process, be suitable for suitable glacing flatness keep a rotation the flexible heat conduction of ring-type contain the magnetic soft ferromagnetic material, and the Cast Strip straightened condition of in the metal continuous cast process, in a conticaster, working, and further make it can be used for various specific belt casters or various belt continuous casting installation for casting.

Claims (62)

1, a kind of method of stablizing and cooling off the ring-type flexible thin heat conduction Cast Strip of containing the soft magnetism ferromagnetic material, advance in the crystallizer space that wherein casts along a motlten metal in this Cast Strip, this Cast Strip has a front surface and the reverse side that deviates from this crystallizer space towards the crystallizer space simultaneously, said method comprising the steps of:

Have the ferromagnetic pole pieces array of soft magnetism that is arranged on the pole surface in the coplane array of Cast Strip reverse side by one the Cast Strip is applied the power of stretching out, applying this method of stretching out power and be by adopting provides enough suitable permanent magnets of stablizing the power of stretching out of this Cast Strip to magnetize described pole pieces to the Cast Strip to realize; And

Meanwhile inject by the multiply supercharging cooling agent stream that ejects near the pole surface place to the Cast Strip reverse side, described cooling agent stream makes the Cast Strip float with pole surface and separates certain clearance with it, advances in the gap that described cooling agent stream of while passes between Cast Strip reverse side and the pole surface.

2, the method for claim 1 comprises:

Before described multiply supercharging cooling agent stream is injected into the Cast Strip reverse side, with they throttlings regularly.

3, the method for claim 1 comprises:

Guide one basically the uniaxially cooling agent stream that passes the gap between the pole pieces along the Cast Strip reverse side be used for removing the cooling agent that has passed described gap from the Cast Strip reverse side.

4, the method for claim 1 comprises:

Utilization in described coplane array, have north and south poles alternately pole surface permanent magnet with described pole pieces magnetize,

5, the method for claim 1 comprises:

The liquid coolant flow that pumps into is ejected into the head tank that is close to pole surface in the face of the Cast Strip reverse side, simultaneously

Before the liquid coolant that will pump into is ejected into head tank with the liquid coolant throttling that pumps into.

6, method as claimed in claim 4 comprises:

With the liquid coolant that pumps into spurt into by pole surface around head tank, and

Before spurting into each head tank respectively with liquid coolant throttling regularly.

7, the method for claim 1 comprises:

Before the described multiply cooling agent stream of throttling regularly, provide the liquid coolant of suitable pressurization to be used for making it and pole surface certain interval at interval the Cast Strip is floating.

8, the method for claim 1 comprises:

Utilize permanent magnet that described pole pieces is magnetized, wherein, at least one magnet has a mid point differential demagnetization magnetic conductivity that is equal to or less than about 4 Δs Gauss/Δ oersted.

9, method as claimed in claim 8 comprises:

Utilize the described pole pieces of permanent magnet magnetization, wherein, at least one magnet has a residual magnetic flux density that is equal to or greater than about 8,000 Gausses.

10, the method for claim 1 comprises:

Utilize the described pole pieces of permanent magnet magnetization, wherein, at least one magnet has the mid point differential demagnetization magnetic conductivity that is equal to or less than about 2.5 Δs Gauss/Δ oersted.

11, method as claimed in claim 10 comprises:

Utilize the described pole pieces of permanent magnet magnetization, wherein, at least one magnet has a residual magnetic flux density that is equal to or greater than about 10,000 Gausses.

12, the method for claim 1 comprises:

With the described pole pieces of permanent magnet magnetization, wherein at least one magnet has one and is equal to or greater than about 10,000 Gausses' residual magnetic flux density and has the mid point differential demagnetization magnetic conductivity that is equal to or less than about 1.2 Δs Gauss/Δ oersted.

13, the method for claim 1 comprises:

By a large amount of magnetic lines of force is departed from out the Cast Strip, make and easily the Cast Strip to be removed from the crystallizer space.

14, the method for claim 1 comprises:

Before motlten metal being fed into described crystallizer space, supply coolant stream under the pressure that is used to form the described cooling agent stream that pumps into;

Before the Cast Strip is removed from the crystallizer space and before the cooling agent in stop supplies, the feed-disabling melt metal; And

Be used to make the pressure of liquid coolant of magnetic force tape and utilization that described pressure is not existed by utilization and the magnetic line of force is departed from the Cast Strip, automatically optionally the magnetic line of force is turned to the Cast Strip and depart from the Cast Strip, so that can easily the Cast Strip be removed from the crystallizer space.

15, a kind of method of stablizing and cooling off the ring-type flexible thin heat conduction Cast Strip of containing the soft magnet magnetic material, advance in the crystallizer space that wherein casts along a motlten metal in this Cast Strip, this Cast Strip has a front surface and the reverse side that deviates from this crystallizer space towards the crystallizer space simultaneously, said method comprising the steps of:

The Cast Strip reverse side is placed array place near a soft magnet magnetic material pole pieces, and these pole pieces have pole surface, and these pole surface are arranged in one in the coplane array of Cast Strip reverse side;

Utilize permanent magnet that described magnetic pole is magnetized, make the pole surface with north and south poles alternately be positioned at described coplane array, the enough strong magnetic attraction that stretches out by being stretched out by pole pieces is stabilized in straightened condition with the Cast Strip,

Meanwhile, by cooling agent stream being pumped in the head tank that is centered on by pole surface, so that cooling agent stream is added to the reverse side of Cast Strip, the cooling agent stream that utilization is discharged from head tank, make it the Cast Strip to be supported on the position of leaving pole surface by the reverse side of Cast Strip and the gap between the pole surface.

16, a kind of equipment of stablizing and cooling off the ring-type flexible thin heat conduction Cast Strip of containing the soft magnet magnetic material, advance in the crystallizer space that wherein casts along a motlten metal in this Cast Strip, this Cast Strip has a front surface and the reverse side that deviates from this crystallizer space towards the crystallizer space simultaneously, and described equipment comprises:

A plurality of hydromagnetic devices;

Each hydromagnetic device comprises a pole pieces of being made by the soft magnet magnetic material with pole surface;

Described pole surface is positioned at one can be in the face of the coplane array of Cast Strip reverse side;

Each hydromagnetic device comprises that at least one can and comprise a path that is used for the liquid coolant that supply pumps in head tank towards the head tank of the contiguous pole surface of Cast Strip reverse side;

A plurality of permanent magnets magnetize described pole pieces, make them have the pole surface of the north and south poles that replaces that is positioned at described array; And

Described magnet provides the magnetic pull that stretches out of enough sensing pole surface, is suitable for the Cast Strip is stabilized in straightened condition, makes it to be suspended in groove simultaneously and ejects and can pass on the cooling agent of the supercharging of advancing in the gap between Cast Strip reverse side and the pole surface.

17, equipment as claimed in claim 16, wherein:

A plurality of cooling agents are removed nozzle with direction in the unidirectional basically cooling agent adfluxion, utilize enough big momentum to remove along the Cast Strip reverse side, will remove away from the surface, Cast Strip by the cooling agent between Cast Strip reverse side and the pole surface.

18, equipment as claimed in claim 17, wherein:

Each hydromagnetic device comprises a plurality of head tanks towards the Cast Strip reverse side, and described head tank is near a pole surface, and described hydromagnetic device comprises that a plurality of described paths will be fed into the cooling agent stream throttling of each independent pressure groove simultaneously.

19, equipment as claimed in claim 16, wherein:

Pole pieces is that elongated and parallel at certain intervals relation forms the elongated pole surface coplane array that the space is parallel;

Each pole pieces comprises a plurality of head tanks, and these head tanks are positioned at the position that is spaced apart from each other along elongated pole pieces, and each head tank is centered on by the each several part of the pole surface of pole pieces, and head tank is positioned within the pole pieces.

20, equipment as claimed in claim 19, wherein:

Described cooling agent remove nozzle with described unidirectional basically cooling agent conductance to by the slender space between the elongated pole pieces.

21, equipment as claimed in claim 16 comprises:

The magnetic line of force arrangement for deflecting that can between the position of " leading to " and " breaking ", move;

The position that " leads to " can produce the described enough strong magnetic attracting force that stretches out to pole surface;

The position of " breaking " reduces the magnetic pull of pole surface, makes it possible to easily the Cast Strip be removed from the crystallizer space.

22, equipment as claimed in claim 21 comprises:

Pressure-responsive mechanism, existence response to the pressure of the liquid coolant that pumps into, described magnetic line of force deflecting apparatus is moved to the position of " leading to ", and to the pressure of liquid coolant do not have a response, described magnetic line of force deflecting apparatus is moved to the position of " breaking ".

23, a kind of method of stablizing and cooling off the ring-type flexible thin heat conduction Cast Strip of containing the soft magnet magnetic material, advance in the crystallizer space that wherein casts along a motlten metal in this Cast Strip, this Cast Strip has a front surface and the reverse side that deviates from this crystallizer space towards the crystallizer space simultaneously, said method comprising the steps of:

The Cast Strip of motion is pulled to the coplane array of a pole surface with the magnetic attracting force that stretches out, this array surface is to the reverse side of motion Cast Strip and have alternately north and south magnetic pole on the pole pieces of soft magnet magnetic material, these pole pieces can be provided the enough strong permanent magnet magnetization that stretches out magnetic attraction, are used for the Cast Strip is stabilized in straightened condition; And

Simultaneously the Cast Strip is floated, leave the certain interval of pole surface, be suspended in by on the liquid coolant of the supercharging of throttling, cooling agent is by advancing near the ejection of the nozzle of pole surface and by the reverse side of the Cast Strip of being floated and the gap between the pole surface.

24, method as claimed in claim 23 comprises:

By liquid coolant in the face of a plurality of nozzle ejection superchargings in the pole pieces of Cast Strip reverse side.

25, method as claimed in claim 24 comprises:

The elongated pole pieces that each has an elongated pole surface is set,

Described pole pieces come with the space and be provided with abreast, between about 3/4 inch adjacent pole member in about 2 inches scopes, limit a slender space in adjacent spacing.

26, method as claimed in claim 25 comprises:

By spraying independently by the liquid coolant of throttling along each longitudinally-spaced individual nozzle of each pole pieces, wherein each nozzle is centered on by the part of an elongated pole surface.

27, a kind of method of stablizing and cooling off the ring-type flexible thin heat conduction Cast Strip of containing the soft magnet magnetic material, advance in the crystallizer space that wherein casts along a motlten metal in this Cast Strip, this Cast Strip has a front surface and the reverse side that deviates from this crystallizer space towards the crystallizer space simultaneously, said method comprising the steps of:

A plurality of elongated soft magnet magnetic material pole pieces are set, and each member has an elongated pole surface;

Pole pieces with the parallel relation location of each interval, is limited elongated space between adjacent pole pieces, the elongated pole surface of elongated pole pieces is arranged in the coplane array;

A plurality of permanent magnets that stretch out that each has the north and the South Pole are set;

With magnet pole pieces is magnetized, make adjacent pole surface in the array have north and South Pole polarity alternately;

Pole surface coplane array by the described pole pieces of facing the Cast Strip reverse side that is magnetized applies the magnetic attracting force that stretches out to the Cast Strip; And

Apply multiply by the liquid coolant flow that pumps into of throttling to the Cast Strip reverse side, the Cast Strip is floated, leave the certain interval of pole surface, described cooling agent stream is from being close to that pole surface ejects and advancing forward by the gap between Cast Strip reverse side and the pole surface.

28, method as claimed in claim 27 comprises:

Elongated pole pieces to be spaced apart from each other and parallel relation location, is limited the slender space between the adjacent magnetic sheet member, wherein, described pole pieces space approximately from 3/4 inch to about 2 inches distance.

29, method as claimed in claim 28 comprises:

Be applied to the liquid coolant of removing along the Cast Strip reverse side in the slender space between the adjacent pole member.

30, method as claimed in claim 28 comprises:

In adjacent each described slender space that is spaced apart from each other between the parallel elongated pole pieces, insert at least one permanent magnet; And

Described permanent magnet is arranged in the described slender space, and the permanent magnet pole that makes identical polar is to the reverse side towards each pole pieces.

31, method as claimed in claim 30 comprises:

A plurality of north (N ') and south (S ') pole surface that to stretch out permanent magnet place near adjacent pole pieces side.

32, method as claimed in claim 30 comprises:

Insert a plurality of elongated near the permanent magnet of arranging the effect of stretching out in line along each; And

In each slender space, their polarity is arranged along same direction.

33, method as claimed in claim 27 comprises:

Setting has residual magnetic flux density and is equal to or greater than about 8,000 Gausses and has the permanent magnet that mid point differential demagnetization magnetic conductivity is equal to or less than the effect of stretching out of about 4 Δs Gauss/Δ oersted.

34, method as claimed in claim 33 comprises:

Make the magnetic line of force depart from out the Cast Strip, so that can easily the Cast Strip be removed in the crystallizer space.

35, a kind of equipment of stablizing and cooling off the ring-type flexible thin heat conduction Cast Strip of containing the soft magnet magnetic material, advance in the crystallizer space that wherein casts along a motlten metal in this Cast Strip, simultaneously this Cast Strip have one towards the front surface in crystallizer space and one towards reverse side away from this crystallizer space, described equipment comprises:

Separate each other, parallel, the ferromagnetic pole pieces of elongated soft magnetism;

Each pole pieces has an elongated pole surface, along the pole pieces longitudinal extension;

The described pole surface of described pole pieces is arranged on one in the pole surface coplane array of Cast Strip reverse side;

Each pole pieces has a plurality of nozzles in its elongated pole surface;

Described nozzle is positioned on the position that the each interval of pole surface comes;

Each pole pieces has a service duct, from this passage to described nozzle supply coolant; And

A plurality of permanent magnets that stretch out effect are used to magnetize described pole pieces, and these pole pieces form the pole surface array of north that replaces and south magnetic pole, by the magnetic attraction that stretches out the Cast Strip are pulled to pole surface.

36, equipment as claimed in claim 35, wherein, partly advance around wing shape belt wheel roller of nipping in porch, crystallizer space in the Cast Strip, wherein:

The wing shape belt wheel roller of nipping is nonmagnetic and has the non magnetic wing; And

Elongated pole pieces has narrow nose, and this nose protrudes with respect to the upstream side of the direct of travel of Cast Strip and is assembled in the groove on the belt wheel roller of nipping between the adjacent foil.

37, equipment as claimed in claim 36, wherein:

The nose of elongated pole pieces upstream protrudes into after the district of nipping of crystallizer space inlet, disengages in this Cast Strip, place and the wing.

38, equipment as claimed in claim 36, wherein:

Each nose comprises the removing nozzle of a sensing with respect to the downstream of Cast Strip direct of travel, described removing nozzle points to the reverse side of Cast Strip with an acute angle, be used for the cooling agent conductance to, side is removed along the Cast Strip reverse side between elongated pole pieces downstream.

39, as equipment as described in the claim 38, wherein:

Remove nozzle and place after the district of nipping of upstream side crystallizer space inlet, at this place, the Cast Strip and the wing disengage.

40, equipment as claimed in claim 35, wherein:

The permanent magnet that stretches out effect has the residual magnetic flux density that is equal to or greater than about 8,000 Gausses; And

The permanent magnet that stretches out effect has the mid point differential demagnetization magnetic conductivity that is equal to or less than about 4 Δs Gauss/Δ oersted.

41, equipment as claimed in claim 35, wherein:

Each nozzle comprises a head tank, and this head tank is centered on by a zone of the pole surface of pole pieces towards the reverse side of Cast Strip, and nozzle then is arranged in pole pieces; And

Each nozzle comprises that a throttling path is fed into cooling agent the head tank from service duct.

42, equipment as claimed in claim 40 comprises:

Can be at the magnetic line of force arrangement for deflecting of " leading to " and " breaking " position intermediary movements;

Can produce the enough strong attraction of stretching out in the position of " leading to ", be used for revolting aptly thermal deformation, stablize the Cast Strip to pole surface; And

At the magnetic attraction of the position of " breaking " reduction, thereby can easily the Cast Strip be removed in the crystallizer space to pole surface.

43, equipment as claimed in claim 35, wherein:

An end of each pole pieces comprises that is removed a nozzle, its downstream side point to the reverse side of Cast Strip, be used for the cooling agent guiding, along the reverse side of Cast Strip downstream skidding advance, the end of described pole pieces is positioned at the downstream with respect to the direct of travel of Cast Strip.

44, equipment as claimed in claim 41, wherein:

From feed path to being positioned at a throttling passage of a downstream pressure groove supply coolant of the downstream of close each elongated pole pieces, its cross-sectional area is bigger than the cross-sectional area of other throttling passage in the pole pieces, described other throttling path other head tank supply coolant in pole pieces; And

Downstream head tank downstream is opened and is formed a removing nozzle that points to the downstream, is used to make cooling agent along Cast Strip reverse side flow further downstream.

45, equipment as claimed in claim 44, wherein:

The downstream of each pole pieces has a flange surface towards the Cast Strip reverse side, and assembles to the Cast Strip reverse side along downstream direction; And

Downstream pressure groove downstream is opened, and its sidewall is dispersed and described flange surface is diverged along downstream direction.

46, equipment as claimed in claim 35, wherein partly advance around the belt wheel roller of nipping in the Cast Strip simultaneously, the belt wheel roller of nipping can and have along the belt wheel roll shaft to the identical a plurality of circular wing of isolated diameter around an axle rotation, these wings radially protrude from the belt wheel roller, between the adjacent wing, limit groove, wherein:

Described belt wheel roller is non magnetic;

The described circular wing is made of the soft magnet magnetic material; And

Each elongated pole pieces has an elongated narrow nose, and the updrift side of advancing to the Cast Strip is protruded, and is assembled in the groove between the adjacent foil.

47, adopt at least one annular flexible thin heat conduction Cast Strip of containing the motion of soft magnet magnetic material, the belt caster advanced along the crystallizer space of moving in this Cast Strip at one, this Cast Strip have one towards motlten metal in the front surface in crystallizer space of wherein casting and a reverse side that is used to cool off this Cast Strip, be used for equipment stable and that cool off this motion Cast Strip and comprise:

One is spaced from each other, parallel water cushion apparatus array;

Each described water cushion device comprises a slender member, and it has an elongate surface of extending along this member;

The described elongate surface of described member be positioned at one be spaced from each other, the coplane array of parallel elongate surface in the face of the Cast Strip reverse side;

Each slender member has a plurality of nozzles on its elongate surface;

Described nozzle is positioned at along elongate surface position spaced apart;

Each slender member has a service duct, by this passage to described nozzle supply coolant;

Each nozzle comprises that one centers in the face of the outlet of Cast Strip reverse side and by a zone on surface; And

Each member comprises the throttling path, is used for from service duct to the export supply cooling agent.

48, equipment as claimed in claim 47, wherein:

Described water cushion device is a magnetic water cushion device;

Described slender member is made of the soft magnet magnetic material;

Described elongate surface is elongated pole surface;

A plurality of permanent magnets that stretch out effect magnetize described slender member, and there is surperficial array in the formation that forms the north that replaces and the South Pole, by the magnetic attracting force that stretches out the Cast Strip are attracted to elongated pole surface;

The permanent magnet that stretches out effect has the residual magnetic flux density that is equal to or greater than about 8,000 Gausses; And

The permanent magnet that stretches out effect has the mid point differential demagnetization magnetic conductivity that is equal to or less than about 4 Δs Gauss/Δ oersted.

49, equipment as claimed in claim 47, wherein:

Resilient installing mechanism carries out resilient installation with described hydromagnetic apparatus array, make it towards with move smoothly away from the direction in crystallizer space.

50, equipment as claimed in claim 48, wherein:

At least the permanent magnet that stretches out effect is inserted in the slender space between the adjacent elongated member;

Magnet makes the side orientation of its each pole surface in the face of the adjacent elongated member; And

Each slender member has the subtend of the magnetic pole strength of identical polar to slender member, with the slender member magnetization, is used to provide the elongated pole surface array of alternately northern and south magnetic pole.

51, equipment as claimed in claim 48 also comprises:

Space comes, parallel water cushion apparatus array;

Each described water cushion device comprises a slender member, and this slender member has an elongated pad surface along the slender member longitudinal extension;

Described elongated pad surface is positioned at that come in a space towards the Cast Strip reverse side, the parallel surperficial array of the elongated pad of coplane;

Each slender member has a plurality of nozzles that are positioned at its elongated pad surface;

Described nozzle is positioned at along elongated pad surface to be gone up on the spaced position;

Each slender member has a service duct, thus to described nozzle supply coolant;

Each nozzle comprises one in the face of the Cast Strip reverse side and by the outlet that the zone centers on pad surface;

Described member comprises that throttling passage is used for from service duct to the export supply cooling agent;

Described throttling passage in described water cushion device has the throttling passage big cross-sectional area of a ratio in described hydromagnetic device; And for the direct of travel of motion Cast Strip, described water cushion apparatus array is positioned at the downstream of described magnetic water cushion apparatus array.

52, equipment as claimed in claim 51, wherein:

The described slender member of described water cushion device extends downstream from the pole pieces of magnetic water-cushion device; And

The permanent magnet that stretches out effect only is included in the magnetic water cushion device.

53, a kind of method of stablizing and cooling off the ring-type flexible thin heat conduction Cast Strip of containing the soft magnet magnetic material, advance in the crystallizer space that wherein casts along a motlten metal in this Cast Strip, simultaneously this Cast Strip have one towards the front surface in crystallizer space and one towards reverse side away from this crystallizer space, said method comprising the steps of:

A plurality of magnetic circuits that stretch out are set;

Each magnetic circuit comprises a part that is positioned at the Cast Strip, and extends along a path between the obverse and reverse of Cast Strip, extends abreast with the obverse and reverse of Cast Strip basically simultaneously;

Each magnetic circuit also comprises a part, and this part is roughly the U-shaped pattern with one extends, and this U-shaped pattern has the shank of the pattern of U-shaped, and these shanks extend to the subtend in described path to the reverse side of Cast Strip;

The liquid coolant that applies supercharging to the Cast Strip reverse side is used to cool off the Cast Strip and the Cast Strip is floated with the fluid dynamic educational level of the liquid coolant of supercharging, and cooling agent increases the length of the shank of described U-shaped pattern; And

Weaken and describedly stretch out the magnetic flux in the magnetic circuit in the crystallizer cavity so that can easily the Cast Strip be shifted out.

54, method as claimed in claim 53, wherein:

Described magnetic circuit path is with respect to Cast Strip direct of travel horizontal expansion; And

The adjacent leg of U-shaped pattern have same pole polarity make the shank of north magnetic to that replace and shank South Pole magnetic to horizontal expansion with respect to the Cast Strip direct of travel.

55, method as claimed in claim 53, wherein, the belt wheel roller of nipping is positioned at the district of nipping of crystallizer space upstream extremity, the described belt wheel roller of nipping is made of nonmagnetic substance and has a plurality of circular wings of being made by nonmagnetic substance, they equably along the belt wheel roll shaft of nipping to being spaced and all having an identical external diameter, simultaneously, described Cast Strip near the crystallizer space time partly around the belt wheel roller of nipping advance with the contact of the described wing then the Qu Yuyi that nips separate with being oriented in a tangential direction and along the crystallizer cavity to be roughly the shape advanced downstream on plane, described method comprises:

The described magnetic circuit that stretches out is guided through the non magnetic circular wing of the non magnetic belt wheel roller of nipping and passes the small the air gap of the both sides that are positioned at each wing simultaneously.

56, method as claimed in claim 55, wherein:

Described each of stretching out magnetic circuit is all by a plurality of permanent magnet excitations that stretch out effect, the described permanent magnet that stretches out effect aligns in line and is arranged in the magnet tandem, and these magnets are inserted between the successively contiguous wing and in the Cast Strip with nip between the belt wheel roller.

57, method as claimed in claim 56, wherein:

Stretching out the magnet tandem can extend around being parallel to each other and parallel with the Cast Strip, plane basically axle rotation;

In order to apply the attraction of stretching out to the downstream, Cast Strip from the district of nipping, stretching out the magnet tandem of effect rotates, pass the tandem that replaces that the Cast Strip width has alternately north (N ') and south (S ') utmost point in the face of the Cast Strip by making, make north (N ')-Nan (S ') magnetic line of force path of their inside be substantially perpendicular to the Cast Strip that is roughly the plane and be orientated; And

Reduce and describedly stretch out the magnetic flux in the magnetic circuit in the crystallizer cavity, comprise the steps: so that easily the Cast Strip is shifted out

While rotating magnet tandem, point to north (N ') utmost point of adjacent tandem by north (N ') utmost point that makes each tandem, make south (S ') utmost point of each tandem point to south (S ') utmost point of adjacent tandem, make north (N ')-Nan (S ') magnetic line of force path of their inside be arranged essentially parallel to the Cast Strip orientation that is roughly the plane.

58, equipment as claimed in claim 36, wherein:

Described elongated pole pieces comprises:

First, its close Cast Strip,

And second portion, it is away from the Cast Strip;

Described first and second parts of pole pieces are assembled in the groove of the belt wheel roller of nipping between the adjacent foil;

In the described elongated pole pieces each comprises an elongate rotor, between described first and second parts of pole pieces;

Each elongate rotor is along elongated pole pieces longitudinal extension;

Each elongate rotor has a rotating shaft, and this axle is along elongated pole pieces longitudinal extension;

Each elongate rotor comprises that at least one permanent magnet tandem and their north, inside (N ')-Nan (S ') magnetic line of force path are orientated along same direction;

Whole described inner magnet line of forces path all is orientated perpendicular to the rotating shaft of rotor.

59, equipment as claimed in claim 58, wherein:

Described first and second parts of each pole pieces have cylindrical surface, these surfaces in the face of and band certain distance ground near the elongate rotor in the pole pieces and

Described cylindrical surface is concentric with the rotating shaft of rotor.

60, equipment as claimed in claim 59, wherein, a common actuation device is connected with all rotors, being used for stretching out the orientation of attraction and " breaking " in " leading to " reduces between the orientation of attraction and rotates all rotors simultaneously, when stretching out the attraction orientation in " leading to ", north, inside (N ')-Nan (S ') magnetic line of force path of the magnet tandem in the alternately adjacent rotors in traversing the pole pieces array of Cast Strip horizontal expansion has the Cast Strip of sensing and points in the array in succession the polarity that replaces of pole pieces first pole parts and is used for applying to the Cast Strip from described first and stretches out attraction, and when the reduction attraction orientation of " breaking ", be greatly diminished to the attraction that the Cast Strip applies from described first pole parts, north, inside (N ')-Nan (S ') magnetic line of force path of rotor inner magnet tandem is parallel with the Cast Strip basically simultaneously.

61, equipment as claimed in claim 58, wherein:

Each rotor comprises a plurality of permanent magnet tandems of stretching out arranged in a straight line vertically; And

At least one described tandem in each rotor is positioned at downstream enough far away, that is, it is positioned at the downstream of the described wing.

62, equipment as claimed in claim 58, wherein:

Described elongated pole pieces is distinguished the downstream position that extends to the downstream that is positioned at the described wing downstream together with their elongate rotor from nipping.

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